Add draft facette connector
Fix crash with providers initialization

 * Stop on initialization error
 * Prevent uninitialized worker from being added to the pool
Add duration to range conversion in `utils`
Update request structure in `facette` connector
Facette connector returns upstream plots results
Remove debug output in facette connector
Add context to error messages in facette connector
Split workers code file per worker type
Fix graphite connector
Fix typo in worker_provider.go filename
Fix redirection warning with UI API calls
Remove unneeded UI element in scale management
Fix human readable formatting with negative values
Add TODO comment
Add TODO comment
Fix `Move Up` action in graphs management
Fix various Administration Panel issues

 * Fix stuck form issue after metric edition in graph management
 * Fix incorrect origin selection when editing group
Honor plot query scales in graphite connector
Removed useless comment
Removed useless comment