* master: (322 commits)
  graphInterval needs to update after query execution, fixes #14364
  Explore: Parse initial dates
  Aligned styling of stats popover/box with rest of grafana & minor css refactoring
  Prometheus: Make result transformer more robust for empty responses
  Rebase fixes
  Explore: Logging line parsing and field stats
  fixed unit tests
  made unknown color theme aware and sync with graph color, some minor cleanup
  Explore: improve error handling
  use render props instead of cloneElement
  sort of a hacky way to figure if the small variation should be used for the label
  add basic button group component, using the the same label style as is
  explore logs styling
  wip: alternative level styling & hover effect
  wip: explore logs styling
  more detailed error message for loki
  If user login equals user email, only show the email once #14341
  UserPicker and TeamPicker should use min-width instead of fixed widths to avoid overflowing form buttons.  #14341
  wip: explore logs styling
  restoring monospace & making sure width are correct when hiding columns
  ...