Merge remote-tracking branch 'grafana/master' into annotations-created

* grafana/master: (51 commits)
  Use curly brackets around hyperlink help text #11478 (#11479)
  migrated playlist-routes to ts
  migrated last all.js to ts
  Notes for closing #7119
  changelog: adds note for #11128
  variables: adds test for variable sorting
  Add case-insensitive sort for variables.
  graphite: fixes #11434
  settings: fixes test
  changed from margin to padding
  changed variable for tabbed close btn hover, and changed text-strong variable for lighttheme, removed commented out variable
  mssql: typos in help sections
  Webpack Grafana plugin template project to links (#11457)
  rm panel.type  constrain from threshold_mapper.ts (#11448)
  No need for node_modules/bin in npm run-script (#11449)
  changelog: adds note about closing #11555
  add article
  fix some typos
  migrated graph_tooltip to ts
  started migration to ts
  ...

pkg/api/dtos/models.go

@@ -50,6 +50,10 @@ type UserStars struct {
 }
 
 func GetGravatarUrl(text string) string {
+	if setting.DisableGravatar {
+		return "/public/img/user_profile.png"
+	}
+
 	if text == "" {
 		return ""
 	}