HIG fixes for the rest of cui (and a bit of sw)

* Standardize spacing and make some dialogs waste less space
* Add missing colons to labels that precede controls (fdo#78826)
* Disable manual resizing where it doesn’t make sense
* Standardize Help button’s position (fdo#76486)

Change-Id: Ib3f7f830e890e67f72aab970571793f495bab956
Reviewed-on: https://gerrit.libreoffice.org/12207
Reviewed-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>
Tested-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>