In some setups (ex openshift), the Datasource will require Grafana
to pass oauth token as header when sending queries.
Also, this PR allow to send any header which is something
Grafana currently does not support.

removed QueryOptionsCtrl references

docs: correct provisioning link

It was pointing to Prometheus documentation instead.

Karma to Jest: graph-tooltip

[skip ci]

Disable save dashboard button when saving

Upgrade mattn/go-sqlite3 to v1.7.0

Propagate specific git-sha into tarball and docker builds

changed som variables to values so it's the same for dark and light theme, added special styling for login text, link and input (#12196)

[skip ci]

dashboard: fix so panel titles doesn't wrap

* make wheel passive

* remove console

Respect explore settings in config ini

Query helpers, Annotations, and Template Variables for IFQL datasource

* nicer collapsed row behavior

* don't block events

* use a div to toggle

* use singular name

* Implements findMetricQuery()
* Macros for template queries: measurements(), tags(), tag_values(),
 field_keys()
* Tests for macro expansion

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

Previous explore restrictions only took permissions into consideration.

* add `exploreEnabled` to global settings
* only bind `x` if enabled
* only show explore in panel menu if enabled

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

* raw CSV preview next to query field (query inspector is not that
 useful here)
* added result table and record counts

InfluxDB IFQL datasource (beta)

[skip ci]

Always show server admin link in sidenav if grafana admin