* [WIP] Metrics browser
* Removed unused import
* Metrics selection logic
* Remove redundant tests
All data is fetched now regardless to the current range so test for checking reloading the data on the range change are no longer relevant.
* Remove commented out code blocks
* Add issue number to todos
Co-authored-by: Piotr Jamróz <pm.jamroz@gmail.com>
* Fuzzy search prototype
* Aggregate filter and sorting functions for auto-complete suggestions
* Add a test for fuzzy search
* Simplify setting fuzzy search information
* Rename SimpleHighlighter
* Test PartialHighlighter
* Add PartialHighlighter snapshot
* Simplify PartialHighlighter
* Revert env change
* Clean up the code
* Add fuzzy search for labels
* Bring back backwards compatiblity
* Expose search function type only
* Update docs
* Covert snapshot test to assertions
* Fix docs
* Fix language provider test
* Add a test for autocomplete logic
* Clean up
* Mock Editor functions
* Add fuzzy search to Prometheus labels
* Add docs about backwards compatibility
* Simplify main fuzzy search loop
* Add rate interval variable to prometheus data source
* Add tests + auto complete
* Fix prometheus tests
* Add doc
* Modify test title
* Modify kbn method name after merge
- `unless`, `or` and `and` are binary operators
- if they appear in a query the query was broken up so the suggestor
only works on the current term
- this change fixes the splitter logic to make sure those keywords are
not inside a word
* Prometheus: Display HELP and TYPE of metrics if available
- Prometheus recently added a metadata API around HELP and TYPE of
metrics
- request metadata when datasource instance is created
- use metadata to show help and type in typeahead suggestions and in
metrics selector as tooltip
* Fix types
* Prometheus: disable dynamic label lookup on big datasources
- when a prometheus datasource has more than 10000 metrics, label lookup
for the query field is disabled
- installations of that size have slow typehead lookup times and make
the editor sluggish
* Raise dynamic lookup threshold to 10000 metrics
* Run start tasks again
