Blender Git Loki

GPencil: Revert commit d727f4f22340 (Interpolate menu)

The menu is not redundant, it is just another way to reach the tool and also give more discoverability of the operator shortcut (Many tools in Blender are also on menus, toolbar or header, just think of Move, Rotate, Scale).

There is also no reason to force the user/artist to change to edit mode for interpolate strokes, when the tool works perfectly in drawing mode too. It would only slow down the 2D animation workflow.

Reviewers: @mendio