* Added a new tool "Synchronise with Armature" (found under Channels->Grouping), which synchronises the grouping of action-channels and the grouping of their relevant bones.
This only works when the active object is an armature, and the action isn't pinned. All of the action's action-channels are removed from their groups, and are added back into groups according to the current grouping of their corresponding bones.
A bit of testing for weird cases is needed.
* Group colours are now not drawn if the group originally was using the 'default' colour-set.
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