[3.4.x] MediaNavigationBar: Adjust close button behavior

Some adjustments have been done to the close button's behavior. For the audio player: - The single press action will minimize the player - The long press action will close the player

For the video player: - The single press action will close the player - The long press action will minimize the player

Long press actions will display the status label stating the action that will be performed: the minimizing or the closing of the player.

Closes #1453 (closed)

(cherry picked from commit c962e0fc, backport of !1008 (merged))