Instead setting value to volume scale, set value to the player itself. Scale will be updated due to bidirectional binded property. This fixes cases where slider did not emit value-changed notify as it was being set to the same value as initial one.
Bottom revealer motion controller was causing timeout to be cleared. Prevent that by making it child invisible when windowed, which will remove its allocated height and motion events will not be emitted.
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.
Window headerbar is hidden at all times. We do not want to execute the logic that comes with GtkHeaderBar, so we simplify it by using GtkBox as a dummy widget.
We want to have a non-osd popover in the button that is placed on OSD headerbar. This is something unusual that Adwaita does not have, so create a custom style that will use common values from user system theme.
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
Floating mode now works entirely different then before (only controls gets hidden/revealed with animation). Change the used icon to better match this new behaviour.
Adwaita does not have rounded corners yet, but will have soon. Enforce rounded corners in the app only for Adwaita to avoid bumping min required GTK version.
