Bug with Wayland plus Qt for autocompletion and calltips

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[Branched from the "Decreasing seams in scaled windows" thread]

> There is a further problem with current Ubuntu+Wayland in that the 
windows for autocompletion and calltips fail as they do not have an owning 
window as their transientParent. 

This is now fixed in the repository 
with https://sourceforge.net/p/scintilla/code/ci/c105229352ea0d14ee483003ba8c8836bcd258f1/ 
.

It turns out that setTransientParent can be called inside the showEvent of 
a QWidget and that makes the popup appear successfully.

Please report any bugs with this change.

Neil

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[Branched from the "Decreasing seams in scaled windows" thread]<div><br /><=
div>&gt; There is a further problem with current Ubuntu+Wayland in that the=
 windows for autocompletion and calltips fail as they do not have an owning=
 window as their=C2=A0transientParent.=C2=A0</div></div><div><br /></div><d=
iv>This is now fixed in the repository with=C2=A0https://sourceforge.net/p/=
scintilla/code/ci/c105229352ea0d14ee483003ba8c8836bcd258f1/ .</div><div><br=
 /></div><div>It turns out that setTransientParent can be called inside the=
 showEvent of a QWidget and that makes the popup appear successfully.</div>=
<div><br /></div><div>Please report any bugs with this change.</div><div><b=
r /></div><div>Neil</div>

<p></p>

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