LCL: TControlScrollBar: fixed InternalSetRange

git-svn-id: http://svn.freepascal.org/svn/lazarus/branches/fixes_1_2@45193 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: component palette: no scrollbars on Carbon, layout buttons with floating layout

git-svn-id: http://svn.freepascal.org/svn/lazarus/branches/fixes_1_2@45194 4005530d-fff6-0310-9dd1-cebe43e6787f