IDE: mode matrix: update syntax check after changing type

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41577 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: mode matrix: fixed changing type of last row

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41578 4005530d-fff6-0310-9dd1-cebe43e6787f