MIDI note stretching

Hi, thanks for this great project.
There is one fundamental thing which is very important for me to be able to effectively work in qtractor - stretching of the notes in the midi editor - in Edit Off mode when having selected multiple notes, they should all stretch, not just the one clicked at.
The stretching would enable to speed-up/slow-down parts of midi patterns:
Please add this feature, now it is much pain to work around it, and I know I am not the only one missing it.