Panel config dialog: resize with long text
We switch to using a GridLayout instead of multiple Row/ColumnLayouts, with the new uniformCellWidths
option (since Qt 6.6). Also, Comboboxes now have an implicitContentWidth of their widest option.
For English, there should be no visual differences (for now). However, this greatly improves the appearance in cases where languages have longer text, or where comboboxes have multiple options whose text is wider than the minimum width (eg with !1813 (merged)).
cc @teams/vdg
Replaces !1828 (closed)