Mediaplayer cleanups, no functional changes

Reordered functions
Renamed functions
No space in kargs
EmcMenu: Fix an error when try to select the first/last item that is disabled
Media controls: always change the volume on UP/DOWN

Also close the Audio/Video/Subs menu when UP on the first item
Redone the EmcNotify edc layout.

Same design but better edc, now it align correctly and use text styles