* master: (117 commits)
  fix: share snapshot controller was missing ngInject comment, fixes #10511
  Use URLEncoding instead of StdEncoding to be sure state value will be corectly decoded (#10512)
  Optimize metrics and notifications docs
  Optimize cli and provisioning docs
  docs: Guide for IIS reverse proxy
  changelog: adds note about closing #9645
  telegram: Send notifications with an inline image
  telegram: Switch to using multipart form rather than JSON as a body
  telegram: Fix a typo in variable name
  fix: alert list pause/start toggle was not working properly
  fix template variable selector overlap by the panel (#10493)
  dashboard: Close/hide 'Add Panel' before saving a dashboard (#10482)
  fix: removed unused param
  Fix variables values passing when both repeat rows and panels is used (#10488)
  moved angular-mocks out of dependencies
  ux: minor change to alert list page
  ux: minor word change to alert list
  fix: updated snapshot test
  Add eu-west-3 in cloudwatch datasource default's region (#10477)
  fix: Make sure orig files are not added to git again #10289
  ...