* grafana/master:
  Fixed type issues introduced by adding angular types
  Typescript noAny fixes, start of a long journey
  Updated code stats collection
  Updated path to new script
  POC on collecting metrics in ci process
  renamed default variables: s -> sm, m -> md, l -> lg
  removed gf-form-margin variable and replaced with space- variables where it was used
  heatmap: able to hide buckets with zero value #12080
  s -> sm, m -> md, l -> lg
  heatmap: fix prometheus buckets sorting, closes #15637
  s -> sm, m -> md, l -> lg
  removed headings-margin-bottom variable
  remove kbn test
  Added scopedVars argument in datasourceSrv.get in DataPanel
  Refactoring of multi-value datasource PR #15812
  fixed minor misstake with dashboard padding
  removed -margin, replaced with new general variables
  added new space variables to margins in AddPanelWidget, add_data_source, dashboard_settings and sidemenu
  added new variables for spacing, set margins in _cards with new variables
  Make datasource variables multiselect and dashboard repeatable