Blender Git Loki

GPencil: Usability Tweaks to "Onion Skins" toggle on header

* The state of this toggle now reflects whether onion skinning is enabled on
any layer, instead of just the active layer. This is handy if there's more than
one GP datablock being shown in the scene, and you need to track down whether it's
the current GP datablock that has a layer with this enabled

* Disabling the toggle now turns off onion skinning on ALL layers at the same time.
This makes it much faster to turn off onion skinning if you've got it enabled
on several layers and would now like to disable it (e.g. for a "clean" pass over
the anim)

* Toggling this button still enables onion skinning for just the active layer,
since that's the one you're most likely to want to see these for (i.e. the character
outlines are on this layer, but some of the background elements are animated, and you
don't really want to see those ghosted)