bug#51794: 29.0.50; invalid input events generated from a mouse click for the tab bar

[martin rudalics]

>> bug fix #50993 is the bug.  it made make_lispy_position skip setting
>> posn to the tab_bar if track_mouse is non-nil.  why track_mouse is nil
>> for some frames and not for others i didn't look into.
>> thoughts/comments?
>
> Please do look into that last part, because we need to understand the
> situations in which this happens well enough to devise a solution.  We
> don't want to revert that fix because it will re-introduce a larger
> problem.  Specifically, why does this happen to you only under those
> customizations and not in "emacs -Q"?
>
> Martin, any suggestions?

Maybe the attached patch helps.

martin

track-mouse.diff
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