Port ActorBrowsingMode over to the new Editor Config system to have separate settings for each outliner
Enable Stacked Hierarchy Headers by default
Add the ability to disable framing selection
Add the ability to get the most recently used outliner from the level editor
Fix a bug where renaming an item on one outliner would sometimes execute the rename on a different outliner
#rb richard.malo
#jira UETOOL-5014
#preflight 627aa9811e74993343331221
[CL 20126651 by aditya ravichandran in ue5-main branch]
Scene Outliner refactored to remove all actor-specific code.
Now uses modular modes and hierarchies to allow representation of any data model.
#rb patrick.enfedaque matt.kuhlenschmidt
#jira none
#fyi tim.gautier
[CL 13922848 by roey borsteinas in ue5-main branch]
