Re: compilation of `ftinspect` fails

[Charlie Jiang]

Hi Werner,
> Please add code to the meson and cmake build files that checks whether
> the Qt version you need is installed.  If not, make them exit with an
> error.  After you are done you can revert the work-around for older
> Qt5 versions :-)

OK, I've push the reverted version with check conditions in CMake and 
Meson scripts to the `gsoc-2022-chariri-3` branch (open a new branch in 
case you want to still use Qt 5.12 to checkout my progress). Let me know 
if the old `gsoc-2022-chariri-2` (containing the 5.12 workaround) is no 
longer needed.

Cheers,
CharlieJiang