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.