Make all windows moveable by default

[Vitaliy Margolen]

Dmitry Timoshkov wrote:
> Hello,
> 
> an app I'm working on creates a top level window without a caption,
> and returns HTCAPTION on WM_NCHITTEST to make the window moveable by
> dragging its client area. The app's window currently is not moveable
> under Wine because we don't set MWM_FUNC_MOVE WM hint for captionless
> windows. This patch makes my app's main window moveable.

This patch broke some full screen programs for me on KDE. Now their
caption is always visible and doesn't move off the screen. It might be
some additional magic going on with KDE to detect full-screen windows.

Vitaliy