LCL: a small optimization to TArrow.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41231 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: mode matrix: active mode

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41232 4005530d-fff6-0310-9dd1-cebe43e6787f