The slot was auto-connected by name to QComboBox::activated(QString),
which Qt 6 removed, so connectSlotsByName() found no signal and picking
a variable in the "Texte composé" dialog did nothing. activated(int)
exists in Qt 5 and Qt 6; the slot never used its argument and reads
currentData() as before.
Same fix as the CompositeTextEditDialog half of #674, which was closed
unmerged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>