It should fix it when input and output pictures don't have the same
properties (close #3063).

It will avoid selecting a non subtitle page at the core levels.

And replaced QVLCIconLabel with QVLCFramelessButton.

They are not supported.

They are not the same as the chroma plane are swapped.

  The module did not mark the subtitles it produces with "b_subtitle == true",
  which causes them to be handled as OSD, and thus allowing them to become
  out of sync unless video was streamed in real time...
Signed-off-by: Laurent Aimar <fenrir@videolan.org>

Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

+ Add missing include

Signed-off-by: Jean-Philippe André <jpeg@videolan.org>

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>