applets/mediacontroller: Use PauseAnimation in replaceExit
applets/mediacontroller: Use PauseAnimation in replaceExit
Keep the old image around till the new one is fully faded in, or the background is too obvious when using a light theme.
applets/mediacontroller: Perform fade-out when image ratio changes
If the new ratio and the old ratio are different, perform a fade-out animation for the old image to prevent it from suddenly disappearing.