Hi @shlop_op . Does it mean you already have an implementation on Windows and it’s working okay as far as you’re concerned? I see your screenshot shows the button that’s normally not there.
If yes – then I think it’s fine to go ahead and open an MR and ask for feedback there. That should not be too much work at this point. If the response is positive, you can go ahead and test the change on other platforms and polish it to make it through the review.
I see the bug you linked is CONFIRMED, meaning it’s a problem that was already acknowledged. Based on that, the fix probably won’t be rejected without a clear reason.
For other cases where you don’t have the change ready yet, you can get in touch with the developers via IRC and ask if working on something is a good idea. You can find the contact info in the official docs: Introduction to Hacking Krita — Krita Manual 5.2.0 documentation