* Loki: Updated cheat sheet with new filter syntax
- updated cheat sheet with new filter syntax
- added user-specific examples from the user's label set
- added link to LogQL docs
- separated styles for examples (clickable) and expressions
* Review feedback
* Wip: Removes queryTransactions from state
* Refactor: Adds back query failures
* Refactor: Moves error parsing to datasources
* Refactor: Adds back hinting for Prometheus
* Refactor: removed commented out code
* Refactor: Adds back QueryStatus
* Refactor: Adds scanning back to Explore
* Fix: Fixes prettier error
* Fix: Makes sure there is an error
* Merge: Merges with master
* Fix: Adds safeStringifyValue to error parsing
* Fix: Fixes table result calculations
* Refactor: Adds ErrorContainer and generic error handling in Explore
* Fix: Fixes so refIds remain consistent
* Refactor: Makes it possible to return result even when there are errors
* Fix: Fixes digest issue with Angular editors
* Refactor: Adds tests for explore utils
* Refactor: Breakes current behaviour of always returning a result even if Query fails
* Fix: Fixes Prettier error
* Fix: Adds back console.log for erroneous querys
* Refactor: Changes console.log to console.error
- Queries in Explore have been string based
- This PR introduces the use of the DataQuery type to denote all queries handled in Explore
- Within Explore all handling of DataQueries is transparent
- Modifying DataQueries is left to the datasource
- Using `target` as variable names for DataQueries to be consistent with the rest of Grafana
- 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
