Fix indentation.

Change-Id: I0fb904353bc79199d7df957cf756883e425c97eb
Doxygenize comments, and move them in front of the functions.

Change-Id: I03723d1078b7ba726c8cc94887ca854324e3f9d8
vcl: Move MenuFloatingWindow to an own file + adapt code.

The needed changes included:

* Move MenuItemList and MenuItemData to an own file
* Introduce MenuWindow class for pieces shared between MenuFloatingWindow and
  MenuBarWindow.

Change-Id: I129b6ddba6efb8f0cb60018a2d8abafed42552c8
vcl: Move MenuBarWindow to an own file + adapt code.

Change-Id: Id24711ad0a6fa6a0599fcc172c47f48fbe65183b
vcl: Kill bIsMenuBar.

Change-Id: I16bcb4be7fcdba6272f9f4a92d5c90c71dc431e8