videoob: stop the video when closing with ESC

At least here the player widget continued playing in the background
when closing the window with ESC, it seems it's actually only hidden.

Signed-off-by: François Revol <revol@free.fr>

weboob/applications/qvideoob/video.py

@@ -50,3 +50,7 @@ class Video(QDialog):
     def closeEvent(self, event):
         self.ui.videoPlayer.stop()
         event.accept()
+
+    def hideEvent(self, event):
+        self.ui.videoPlayer.stop()
+        event.accept()