Incremental delete for Grease Pencil stroke

It would be really handy to have an incremental delete on e.g. the backspace key for GP strokes, similar to how it is handled in a other 2d vector software.

So that whenever you would draw a line you could shorten it point by point from the end of the stroke by pressing ' backspace ' - and from the start by pressing ' ctrl+backspace ' (or whatever key combination).