Lazily parse lines and display stats for field when clicked on.

- log line parsers for JSON (basic), and logfmt
- delayed parsing in case user moves to other line
- reuse label stats for field stats

Pickers with min-width instead of width

Explore logs styling

Multi button group

Explore: improve error handling

Improve PostgreSQL Query Editor if using different Schemas

more detailed error message for loki

improve light theme look

use new toggle button group in logs

stop propagation on click event

clean up styles

improve support for small when a label is present

refactoring - move toggle button to the group file. turn it into a stateless component

improve support for light theme

rename dedupe to dedup

use radius variable

remove not used code

cleanup

Explore logs css refactor

if grafana tries to access loki without promtail running
it will return an error.

UserPicker and TeamPicker should use min-width instead of fixed widths to avoid overflowing form buttons.  #14341

fixed logs to time series calculation issue, increased bucket size

Rename Grafana Logging Datasource to Loki

This handles three different error cases for the
config page so that the user gets an error and not
just a blank red error box.

pkg/*: Fix misspelling issues using locale US

fix for panel height when embedding 

fix for panel-initialized event not being called

added support for influxdb cumulative_sum function in tsdb

redact value for plugin proxy routes

See,
$ find . -type f | xargs misspell -locale US | grep -vi -e vendor -e devenv -e Unknwon -e Destory | grep pkg
./pkg/services/sqlstore/org_test.go:190:15: "frome" is a misspelling of "from"
./pkg/tsdb/elasticsearch/response_parser.go:544:24: "Unkown" is a misspelling of "Unknown"
./pkg/tsdb/opentsdb/opentsdb.go:87:20: "marshalling" is a misspelling of "marshaling"
./pkg/components/dynmap/dynmap_test.go:2:7: "Licence" is a misspelling of "License"
./pkg/components/dynmap/dynmap.go:2:7: "Licence" is a misspelling of "License"

fix for panel embedding. Solo panel height was not correctly set. Made panel--solo into panel-solo class. in develop branch we have remove the need for the panel class