SceneObjectBase: Call self activation handlers before child data, time range and variable handlers

[torkelo]

I noticed a bug in scenes dashboards with AnnotationDataLayer not working with data source variables, resulting in error AnnotationsDataLayer.js:95 AnnotationsDataLayer error {message: 'Datasource ${ds} was not found'}

I tracked it down to an issue with scene $data, $timeRange and $variables being activated before the local (own) level activation handlers. Resulting in data layers on the top dashboard level being activated before the dashboard scene itself (that sets the window.__grafanaSceneContext without this the variable system is not working (because scopedVars with sceneObject was not passed in AnnotationsDataLayer)

Changes

• Call own local level activation handlers before calling $data, $timeRange, $variables and $behaviors activation handlers
• Pass scopedVars with context when getting data source in AnnotationsDataLayer

Release notes

Activation handlers are for a scene object is now called before any direct child activation handlers. Before this release the activation handlers of direction $data, $timeRange, $variables and $behaviors was called before the SceneObjects own activation handlers.

[torkelo]

@dprokop had not pushed it :)

[grafanabot]

:rocket: PR was released in v3.9.0 :rocket: