Collective Operations over multiple layers/groups in Krita

Krita is an open source digital painting platform used by professionals. Artists usually work with multiple layers for a single element in their work (like lineart, colors). So there are cases when they want to apply similar operations over multiple layers. Having KDE's Krita the ability to process these types of operations gives a heavy advantage to it's users.

Goal of this project is to provide Krita, the ability to apply operations on multiple layers/groups in a single key-stroke.