This reverts commit fa022a9c.

because if a right-click context menu is active and we click outside it in
order to remove it then that click goes to whatever is underneath the mouse
which is undesirable

the list dropdown part of this looks good, its the general menus that are the problem

Conflicts:
	vcl/source/window/winproc.cxx

Change-Id: Ib96e52f22cdeefd59dbf4333f555d9f52b3385e2