Instead of setting hide controls timeout immediately when starting revealing, make the time controls are revealed constant by setting timeout after animation finishes.
Now that player API itself is operating on a cubic scale (no value conversion required), the volume slider can be bind to the volume property. Thanks to that, player volume scale will correctly reflect Clapper volume set via external applications e.g. gnome-settings.
Fullscreen bottom controls panel does not look good when progress bar is too long (especially on "ultrawide" displays), so limit its max width to 1720 application-pixels. This should make it still long enough for convenient chapter seeking.
Clapper no longer has a title bar to show the media title during playback. Update window title so the video title is also shown on "Activities" view in addition to fullscreen top overlay.
This avoids D&D controllers clash and allows to freely customize how maximize, minimize and close buttons work (differently for e.g. web application) and where are they placed
The "clapper_src" directory name was unusual. This was done to make it work as a widget for other apps. Now that this functionality got removed it can be named simply "src" as recommended by guidelines.
