LazControls: TExtendedTabControl added pages (runtime only)

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42609 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: Prepare using new LazControl Tabs (IFDEF'ed), and move icon to tabs

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42610 4005530d-fff6-0310-9dd1-cebe43e6787f