Reversed mouse buttons don't work properly on 6.7.3

I use reversed primary and secondary mouse buttons—that is, right-click is my primary. I do this through xmodmap.  Either left- or right-clicking within an application window is now interpreted as the secondary click (the context menu pops up). Other mouse buttons work normally.

Downgrading all qt6 packages to 6.7.2 causes the issue to disappear. I am guessing it is this commit at fault, and it could be the same root issue as this report.

To reproduce: run `xmodmap -e 'pointer = 3 2 1'` (with a mouse with ≥3 buttons); try left- and right-clicking in any qt6 application.