LCL: support BiDiMode in CoolBar when drawing and calculating locations

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40464 4005530d-fff6-0310-9dd1-cebe43e6787f
LCL, CoolBar: remove unused TCoolBands.Notify method

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40465 4005530d-fff6-0310-9dd1-cebe43e6787f