applets/mediaframe: fix pausing on hover
The widget tries to stop the timer when the user hovers over the image. But this doesn't work - the mousearea in the fullRepresentation can't be accessed by id (as it's a component). The only thing that happens is an error message during loading, but no pausing.
Instead set up an alias in the fullRepresentation and access that through the fullRepresentationItem.
Cherry-pick to 6.3 proposed as it restores intended functionality. No cherry-pick necessary, recent regression.
Edited by Christoph Wolk