ux: minor update to look of stackdriver query help

Explore: compact state URLs

Explore: trigger a query field render to fix highlighting

Explore: do not show default suggestions after expressions

Stackdriver filter wildcards

stackdriver metric name fix. Fixes #13562

Sets metric name even when the metric does not have a displayName field. Closes #13562.

fix for influxdb annotation issue that caused text to be shown twice

New data source as separate page

docs: fix minor typos

Fix text overflow on playlist search  #13464

fix gofmt tests output

Fixed typo in query editor placeholder text.

- an expression ends on closing braces
- exclude expressions from the default/empty suggestions

- some syntax rules are loaded asynchronously
- when they have been received, the query field needs to re-render
- trigger re-render via bogus edit (tried other methods but could not
  find any)

- allow positional state array in URL
- key-based parsing as fallback
- fix issue where split state was kept in URL after closing split

Explore: resize graph on window resize

Print the whole command in "Execute ..." and "... returned 1" logs.
Fix "binary operator expected" by passing quoted output from
`gofmt` to `test`.