Revert r40972, it conflits with External Tools solution from Cyrax

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40974 4005530d-fff6-0310-9dd1-cebe43e6787f
LCL: improvements for TArrow. Publish Color, call Invalidate when setting properties.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40975 4005530d-fff6-0310-9dd1-cebe43e6787f
LCL: don't publish TArrow.Color after all. Color is changed in drawing code.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40976 4005530d-fff6-0310-9dd1-cebe43e6787f