Files
UnrealEngineUWP/Engine/Source/Editor/WorkspaceMenuStructure
Matt Kuhlenschmidt 3ed2bc3c32 First pass prototype of editor modes which can generate a toolbar. This is prototype and will likely be replaced by a more advanced system.
Simply override BuildModeToolbar on FEdMode to use this and generate a toolbar the way you would generate any other toolbar using a ToolbarBuilder.   Only usable in level editor modes for now.

This protoype involved improving tab spawning:
- Added support for tabs which can be forced off even when there is a saved layout for them. E.g for when it doesnt make sense for the tab to be visible.  Editor modes will force the mode toolbar tab hidden when no editor modes require a tab.
- Added support for inserting into tab area splitters by layout customizations. Allows code to add a manditory tab to an already saved layout which doesnt have space for the tab.

#codereview ryan.schmidt, louise.rasmussen
#rb chris.gagnon

[CL 6608544 by Matt Kuhlenschmidt in Dev-Editor branch]
2019-05-22 14:37:50 -04:00
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