Background: A while ago I made this change for QTBUG-100351, the problem back then was that we didn't read CF_DIB data correctly, specifically when pasted from the windows snipping tool. (Since then the snipping tool has changed and is now using CF_PNG)

Now a couple of years later, when copying from Qt to for example Photoshop, pasting produces a CF_DIB that is offset by 3 pixel columns due to the 3 values I added in the dibv5 writer, basically inverting the issue in QTBUG-100351. Apps that read the CF_DIBV5 seems to still work like Paint.