PropEdits: formatting

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@39812 4005530d-fff6-0310-9dd1-cebe43e6787f
LCL: implement method TValueListEditor.InsertRow

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@39813 4005530d-fff6-0310-9dd1-cebe43e6787f