Converter: Optimize commenting units in main and implementation uses sections.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42463 4005530d-fff6-0310-9dd1-cebe43e6787f
Converter: fix the default checked value for missing units checkboxes.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42464 4005530d-fff6-0310-9dd1-cebe43e6787f
Converter: refactor and clean.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42465 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: Remove the "Under construction" text from compiler options Other page.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42466 4005530d-fff6-0310-9dd1-cebe43e6787f