Text subtitles: Set the default clipping rect based on the rendering target.
About dialog: Add the CPU name to the clipboard output.
SubPicAP: Fix unitialized field.

Fixes CID 966363
MainFrame: fix window style misdetection

WS_OVERLAPPED is 0, detect it the roundabout way.
MainFrame: make functor operator() const
FileAssoc: resolve possible deadlock

Morale: think twice before blocking an STA thread.
MainFrame: restore window before auto-zoom

Fixes #4360