[Bf-committers] Introducing Unique Undo operators (feedback required)

[Dalai Felinto]

Hi,

This week the animation team at the institute was asking for a way to
prevent frame changing from polluting the undo stack.

This was partially fixed by removing frame changing from the undo
stack all together - rB13ee9b8e. However this introduces an issue when
someone changes the frame without keyframing the pose.

In order to properly address this, I put together a more robust
approach where a few operators (frame change, frame jump, ...) are
added only once in the undo stack in case they are in sequence.

Bastien and Sergey were suggesting to gather more feedback before
committing this, so here it is: https://developer.blender.org/D2330

Cheers,
Dalai
--
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