Converter: use an existing string constant.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41927 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: hide the "Add and close" button in ComponentList properly when Anchored.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41928 4005530d-fff6-0310-9dd1-cebe43e6787f