See,
$ gometalinter --vendor --disable-all --enable=goconst --disable=gotype --deadline=6m ./...
build.go:113:15:warning: 2 other occurrence(s) of "linux" found in: build.go:119:15 build.go:491:34 (goconst)
build.go:119:15:warning: 2 other occurrence(s) of "linux" found in: build.go:113:15 build.go:491:34 (goconst)
build.go:491:34:warning: 2 other occurrence(s) of "linux" found in: build.go:113:15 build.go:119:15 (goconst)
build.go:381:21:warning: 2 other occurrence(s) of "windows" found in: build.go:423:13 build.go:487:13 (goconst)
build.go:423:13:warning: 2 other occurrence(s) of "windows" found in: build.go:381:21 build.go:487:13 (goconst)
build.go:487:13:warning: 2 other occurrence(s) of "windows" found in: build.go:381:21 build.go:423:13 (goconst)
pkg/api/dashboard.go:67:22:warning: 5 other occurrence(s) of "Anonymous" found in: pkg/api/dashboard.go:67:35 pkg/api/dashboard.go:131:10 pkg/api/dashboard.go:406:13 pkg/api/folder.go:98:22 pkg/api/folder.go:98:35 (goconst)
pkg/api/dashboard.go:67:35:warning: 5 other occurrence(s) of "Anonymous" found in: pkg/api/dashboard.go:67:22 pkg/api/dashboard.go:131:10 pkg/api/dashboard.go:406:13 pkg/api/folder.go:98:22 pkg/api/folder.go:98:35 (goconst)
pkg/api/dashboard.go:131:10:warning: 5 other occurrence(s) of "Anonymous" found in: pkg/api/dashboard.go:67:22 pkg/api/dashboard.go:67:35 pkg/api/dashboard.go:406:13 pkg/api/folder.go:98:22 pkg/api/folder.go:98:35 (goconst)
pkg/api/dashboard.go:406:13:warning: 5 other occurrence(s) of "Anonymous" found in: pkg/api/dashboard.go:67:22 pkg/api/dashboard.go:67:35 pkg/api/dashboard.go:131:10 pkg/api/folder.go:98:22 pkg/api/folder.go:98:35 (goconst)
pkg/api/folder.go:98:22:warning: 5 other occurrence(s) of "Anonymous" found in: pkg/api/dashboard.go:67:22 pkg/api/dashboard.go:67:35 pkg/api/dashboard.go:131:10 pkg/api/dashboard.go:406:13 pkg/api/folder.go:98:35 (goconst)
pkg/api/folder.go:98:35:warning: 5 other occurrence(s) of "Anonymous" found in: pkg/api/dashboard.go:67:22 pkg/api/dashboard.go:67:35 pkg/api/dashboard.go:131:10 pkg/api/dashboard.go:406:13 pkg/api/folder.go:98:22 (goconst)
pkg/api/index.go:63:47:warning: 2 other occurrence(s) of "light" found
in: pkg/api/index.go:91:22 pkg/api/index.go:93:16 (goconst)
pkg/api/index.go:91:22:warning: 2 other occurrence(s) of "light" found in: pkg/api/index.go:63:47 pkg/api/index.go:93:16 (goconst)
pkg/api/index.go:93:16:warning: 2 other occurrence(s) of "light" found in: pkg/api/index.go:63:47 pkg/api/index.go:91:22 (goconst)
pkg/components/null/float.go:71:25:warning: 2 other occurrence(s) of "null" found in: pkg/components/null/float.go:103:10 pkg/components/null/float.go:112:10 (goconst)
pkg/components/null/float.go:103:10:warning: 2 other occurrence(s) of "null" found in: pkg/components/null/float.go:71:25 pkg/components/null/float.go:112:10 (goconst)
pkg/components/null/float.go:112:10:warning: 2 other occurrence(s) of "null" found in: pkg/components/null/float.go:71:25 pkg/components/null/float.go:103:10 (goconst)
pkg/services/alerting/notifiers/pagerduty.go:79:16:warning: 2 other occurrence(s) of "Triggered metrics:\n\n" found in: pkg/services/alerting/notifiers/kafka.go:64:16 pkg/services/alerting/notifiers/opsgenie.go:98:16 (goconst)
pkg/services/alerting/notifiers/kafka.go:64:16:warning: 2 other occurrence(s) of "Triggered metrics:\n\n" found in: pkg/services/alerting/notifiers/pagerduty.go:79:16 pkg/services/alerting/notifiers/opsgenie.go:98:16 (goconst)
pkg/services/alerting/notifiers/opsgenie.go:98:16:warning: 2 other occurrence(s) of "Triggered metrics:\n\n" found in: pkg/services/alerting/notifiers/pagerduty.go:79:16 pkg/services/alerting/notifiers/kafka.go:64:16 (goconst)
pkg/social/social.go:85:11:warning: 2 other occurrence(s) of "grafana_com" found in: pkg/social/social.go:162:14 pkg/social/social.go:197:11 (goconst)
pkg/social/social.go:162:14:warning: 2 other occurrence(s) of "grafana_com" found in: pkg/social/social.go:85:11 pkg/social/social.go:197:11 (goconst)
pkg/social/social.go:197:11:warning: 2 other occurrence(s) of "grafana_com" found in: pkg/social/social.go:85:11 pkg/social/social.go:162:14 (goconst)
pkg/tsdb/elasticsearch/time_series_query.go:92:17:warning: 3 other occurrence(s) of "count" found in: pkg/tsdb/elasticsearch/response_parser.go:152:8 pkg/tsdb/elasticsearch/response_parser.go:167:31 pkg/tsdb/elasticsearch/response_parser.go:315:9 (goconst)
pkg/tsdb/elasticsearch/response_parser.go:152:8:warning: 3 other occurrence(s) of "count" found in: pkg/tsdb/elasticsearch/time_series_query.go:92:17 pkg/tsdb/elasticsearch/response_parser.go:167:31 pkg/tsdb/elasticsearch/response_parser.go:315:9 (goconst)
pkg/tsdb/elasticsearch/response_parser.go:167:31:warning: 3 other occurrence(s) of "count" found in: pkg/tsdb/elasticsearch/time_series_query.go:92:17 pkg/tsdb/elasticsearch/response_parser.go:152:8 pkg/tsdb/elasticsearch/response_parser.go:315:9 (goconst)
pkg/tsdb/elasticsearch/response_parser.go:315:9:warning: 3 other occurrence(s) of "count" found in: pkg/tsdb/elasticsearch/time_series_query.go:92:17 pkg/tsdb/elasticsearch/response_parser.go:152:8 pkg/tsdb/elasticsearch/response_parser.go:167:31 (goconst)
pkg/tsdb/elasticsearch/time_series_query.go:78:9:warning: 2 other occurrence(s) of "date_histogram" found in: pkg/tsdb/elasticsearch/response_parser.go:84:22 pkg/tsdb/elasticsearch/response_parser.go:369:24 (goconst)
pkg/tsdb/elasticsearch/response_parser.go:84:22:warning: 2 other occurrence(s) of "date_histogram" found in: pkg/tsdb/elasticsearch/time_series_query.go:78:9 pkg/tsdb/elasticsearch/response_parser.go:369:24 (goconst)
pkg/tsdb/elasticsearch/response_parser.go:369:24:warning: 2 other occurrence(s) of "date_histogram" found in: pkg/tsdb/elasticsearch/time_series_query.go:78:9 pkg/tsdb/elasticsearch/response_parser.go:84:22 (goconst)

Fix metric-segment options displaying after blur

options displays after blur

Update Configuration.md

added span with folder title that is shown for recently and starred

Fix misspell issues

This is a typo in
https://github.com/grafana/grafana/blob/master/public/app/core/utils/kbn.ts#L1051

See,
$ codespell -S "./.git*,./vendor*,./public*"

See,
$ gometalinter --disable-all --enable misspell --deadline 10m --vendor ./...
pkg/api/dtos/alerting_test.go:32:13:warning: "expectes" is a misspelling of "expects" (misspell)
pkg/api/static/static.go:2:18:warning: "Unknwon" is a misspelling of "Unknown" (misspell)
pkg/components/imguploader/azureblobuploader.go:55:48:warning: "conatiner" is a misspelling of "container" (misspell)
pkg/login/ldap_settings.go:51:115:warning: "compatability" is a misspelling of "compatibility" (misspell)
pkg/middleware/auth_proxy_test.go:122:22:warning: "Destory" is a misspelling of "Destroy" (misspell)
pkg/middleware/logger.go:2:18:warning: "Unknwon" is a misspelling of "Unknown" (misspell)
pkg/services/notifications/codes.go:9:13:warning: "Unknwon" is a misspelling of "Unknown" (misspell)
pkg/services/session/mysql.go:170:3:warning: "Destory" is a misspelling of "Destroy" (misspell)
pkg/services/session/mysql.go:171:24:warning: "Destory" is a misspelling of "Destroy" (misspell)
pkg/services/session/session.go:95:4:warning: "Destory" is a misspelling of "Destroy" (misspell)
pkg/services/session/session.go:96:1:warning: "Destory" is a misspelling of "Destroy" (misspell)
pkg/services/session/session.go:167:25:warning: "Destory" is a misspelling of "Destroy" (misspell)
pkg/setting/setting.go:1:18:warning: "Unknwon" is a misspelling of "Unknown" (misspell)
pkg/tsdb/cloudwatch/cloudwatch.go:199:14:warning: "resolutin" is a misspelling of "resolutions" (misspell)
pkg/tsdb/cloudwatch/cloudwatch.go:270:15:warning: "resolutin" is a misspelling of "resolutions" (misspell)
pkg/tsdb/elasticsearch/response_parser.go:531:24:warning: "Unkown" is a misspelling of "Unknown" (misspell)
pkg/tsdb/elasticsearch/client/search_request.go:113:7:warning: "initaite" is a misspelling of "initiate" (misspell)

Note: Unknwon is a library name, and Destory a mysql typo.

Explore: Fix label suggestions for recording rules

Fix megacheck issues

$ gometalinter --vendor --disable-all --enable=megacheck --disable=gotype --deadline=6m ./...
pkg/tracing/tracing.go:81:25:warning: cfg.New is deprecated: use NewTracer() function  (SA1019) (megacheck)

$ gometalinter --vendor --disable-all --enable=megacheck --disable=gotype --deadline=6m ./...
pkg/services/sqlstore/user.go:274:3:warning: empty branch (SA9003) (megacheck)

$ gometalinter --vendor --disable-all --enable=megacheck --disable=gotype --deadline=6m ./...
pkg/tsdb/elasticsearch/response_parser.go:95:41:warning: should use make(map[string]string) instead (S1019) (megacheck)
pkg/tsdb/elasticsearch/response_parser.go:125:41:warning: should use make(map[string]string) instead (S1019) (megacheck)
pkg/tsdb/elasticsearch/response_parser.go:317:5:warning: redundant break statement (S1023) (megacheck)
pkg/tsdb/elasticsearch/response_parser.go:358:5:warning: redundant break statement (S1023) (megacheck)

append.

$ gometalinter --vendor --disable-all --enable=megacheck --disable=gotype --deadline=6m ./...
pkg/tsdb/elasticsearch/client/search_request.go:59:4:warning: should replace loop with sr.Aggs = append(sr.Aggs, aggArray...) (S1011) (megacheck)
pkg/tsdb/elasticsearch/client/search_request.go:303:4:warning: should replace loop with agg.Aggregation.Aggs = append(agg.Aggregation.Aggs, childAggs...) (S1011) (megacheck)

Explore: Query field fixes

Fix misspelled authentication in Auth overview doc

Don't use unnest in queries for redshift compatibility

Explore: Fix click to filter for recording rule expressions

- parsing of recording rules failed for label suggestor
- added ':' to parsing routine

- recording rule names contain ':'
- include this in the pattern for metric names

Fix megacheck issues

$ gometalinter --vendor --disable=all --enable=megacheck --deadline=10m ./...
pkg/tsdb/elasticsearch/client/client.go:147:13:warning: should use time.Since instead of time.Now().Sub (S1012) (megacheck)
pkg/tsdb/elasticsearch/client/client.go:190:14:warning: should use time.Since instead of time.Now().Sub (S1012) (megacheck)
pkg/tsdb/elasticsearch/client/client.go:218:13:warning: should use time.Since instead of time.Now().Sub (S1012) (megacheck)

$ gometalinter --vendor --disable=all --enable=megacheck --deadline=10m ./...
pkg/plugins/dashboards_updater.go:51:2:warning: 'if err != nil { return err }; return nil' can be simplified to 'return err' (S1013) (megacheck)

$ gometalinter --vendor --disable=all --enable=megacheck --deadline=10m ./...
pkg/services/sqlstore/alert_notification.go:242:3:warning: 'if err != nil { return err }; return nil' can be simplified to 'return err' (S1013) (megacheck)

disable codecov

removes unused files