- when instantiating a datasource, the datasource service checks if the
plugin module exports Explore components, and if so, attaches them to
the datasource
- Explore component makes all major internal pluggable from a datasource
`exploreComponents` property
- Moved Prometheus query field to promehteus datasource and registered
it as an exported Explore component
- Added new Start page for Explore, also exported from the datasource
Adds a datasource selector to the Explore UI. Only datasource plugins
that have `explore: true` in their `plugin.json` can be selected.
- adds datasource selector (based on react-select) to explore UI
- adds getExploreSources to datasource service
- new `explore` flag in datasource plugins model
- Prometheus plugin enabled explore
* Karma to Jest: datasource_srv
* Sort function differs between Karma and Jest
* Fix error based on .sort() implementation
* Remove Karma test
* alerting: only log when screenshot been uploaded
* Remove comments
* Karma to Jest: datasource_srv
* Sort function differs between Karma and Jest
* Fix error based on .sort() implementation
* Remove Karma test
* Remove comments
* Remove console.log
* Remove console.log
* Change sorting and add test for default data source