Fix the selection CSS on the dataSourceBrowser.
Revert 535439d2 and fix reference to `trackedObject`.
Merge remote-tracking branch 'origin/dataSourceBrowser' into dataSourceBrowser-box-select
Synchronize Viewer.selectedObject with the selected node in the DataSourceBrowser.
Track object when double-clicked.
Always make selections match if viewerDynamicObjectMixin is used with DataSourceBrowser. (via @mramato)