IDE: Enable d'n'd in component palette options ListView on Windows, required RowSelect=True. Fix item height.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46847 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: Minor cleanup in component palette options.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46848 4005530d-fff6-0310-9dd1-cebe43e6787f