* master: (250 commits)
  Firing off an action instead of listening to location changes
  Changes after PR Comments
  Made ExplorerToolbar connected and refactored away responsabilities from Explore
  Removed some split complexity
  Fixed some more styling
  Fixed close split look and feel
  Fixed position of Closesplit
  Fixed small issue with TimePicker dropdown position
  Simplified some styles and dom elements
  Fixed some more with the sidemenu open and smaller screens
  Fixed so heading looks good with closed sidemenu
  Restructure of component and styling
  Refactored out ExploreToolbar from Explore
  Fixed reinitialise of Explore
  changelog: add notes about closing #13929
  changelog: add notes about closing #14558
  changelog: add notes about closing #14484
  changelog: add notes about closing #13765
  changelog: add notes about closing #11503
  changelog: add notes about closing #4075
  ...

Fixed reinitialise of Explore

Moving a few things from dashboard folder

upgrade golang to 1.11.5

fix that alert context and result handle context do not use the same derived context.

* master: (262 commits)
  pkg/services/dashboards/dashboard_service.go: simplify return
  Updated url query param encoding to exctly match angular encoding
  Updated snapshot
  Added missing props not being passed to scrollbar component, fixes #15058
  Document /api/health
  changelog: adds note for #15062
  change default rotate_token_minutes to 10 minutes
  fix
  load test/ha fixes
  set low login cookie rotate time in ha mode
  fix multiple piechart instances bug
  scripts/build/*: Fix some golint issues
  scripts/build/*: Fix golint issues Url => URL
  build: fixes building grafana completely within docker.
  dont specify domain for auth cookies
  New snapshot reflecting changes
  Makes the clickable side menu header look great in light theme again
  org id fix for load test
  user auth token load tests using k6.io
  moves cookie https setting to [security]
  ...

pkg/services/dashboards/dashboard_service.go: simplify return

See,
$ gometalinter --vendor --deadline 10m --disable-all --enable=megacheck  ./...
pkg/services/dashboards/dashboard_service.go:167:2:warning: 'if err != nil { return err }; return nil' can be simplified to 'return err' (S1013) (megacheck)