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+++ This bug was initially created as a clone of Bug #22076 +++ While we have a lot of special events for adding/removing tracks and cuechange/cueexit/cueenter. We do not have an event for the case, where a user changes the mode of a track. This is for example needed for custom styleable controls. If the user changes the mode using the context menue from showing/disabled to disabled/showing we need an event for this to update for example the visual state of our controls.
*** Bug 22290 has been marked as a duplicate of this bug. ***