tests: fix missing tests (with .jest suffix)

Update notifications.md

[skip ci]

Fix: Template variables are executing excessive queries

Explore: Fix label filtering for rate queries

Explore: still show rate hint if query is complex

Explore: Filter out existing labels in label suggestions

Explore: Fix initial state in split view

- if the suggestions menu is open, apply the selected item on Enter
- if not open, run the queries

dsproxy: interpolate route url

* Remove unrequired extract-text-webpack-plugin

* Update ngAnnotate to avoid deprecation warning

* Avoid deprecation warning (Tapable.plugin -> hooks)

Allows for dynamic urls for plugin routes. There are a few plugins
where the route url should be configurable and this change allows
using jsonData fields in the url field for a route in the
plugin.json file for a plugin.

Related to #12944

[skip ci]

Provisioning: Should allow one default datasource per organisation

Login button issue in light theme

[skip ci]

add $__unixEpochGroup and $__unixEpochGroupAlias to sql datasources