Merging branch 'j.corr'  into 'main'.

See merge request !2068

[j.fl1] Replace FormLayouter by HeinzFormLayout, which inherits from QFormLayout. Resolve crash in sample view (#808) ()

Merging branch 'j.fl1'  into 'main'.

See merge request !2067

Merging branch 'j.ui2'  into 'main'.

See merge request !2066

Merging branch 'j.grpbox2-'  into 'main'.

See merge request !2065

Merging branch 'j.ui1'  into 'main'.

See merge request !2064