So far the Asset Browser just showed the same menus as the File Browser.
Not all of their entries made sense for the Asset Browser though. I
decided to just give them entirely different classes to avoid confusing
if-else checks everywhere. I think the code duplication this adds is a
minor issue, it's better to keep things seperated clearly IMO.
* View menu: Add "Asset Details" toggle for the sidebar region.
* View menu: Remove recursion sub-menu
* View menu: Remove "File Path" region toggle, which doesn't apply for
the Asset Browser.
Differential Revision: https://developer.blender.org/D12057