At least cwm(1) has problems with Qt6 and thus tdesktop built against it
shows regressions.
Keep building against Qt5 but provide a new flavor that can be installed
alongside, such that users can test both Qt5 and Qt6 versions.
The package is called tdesktop-qt6 and installs telegram-desktop-qt6;
personal profile remains fine in case you switch between Qt versions.
(Only version downgrades, e.g. 4.0.2 -> 4.0.0, cause profile/cache data
to be invalidated and requires relinking the device.)
Feedback sthen
Feedback Tests OK op
1d631e1520