fix windows dragging in desktop grid
Don't disable the main drag handler when canclosewindows is disabled, that one is not used to close windows but to drag them on other desktops or screens BUG: 455268
Don't disable the main drag handler when canclosewindows is disabled, that one is not used to close windows but to drag them on other desktops or screens BUG: 455268
mentioned in commit 99529e58