Improve keyboard shortcuts / fix issues

Currently I have multiple shortcuts to simulate macOS home/end and shift+home/end on windows guest. They do work, which is great, BUT if I start selection by pressing shift+cmd+left and then want to refine it by keeping the shift pressed but releasing cmd and pressing right couple of times, then the shift is not taken into account and the behavior is as if I have just pressed right without holding shift. If I release shift AND cmd, and then press shift again and holding that press right, then the behavior is as expected, but this is hard to train myself to do consistently. Hopefully something can be done about this. Other than that the shortcuts feature is great!