IDE: disable Export button when there is nothing to export in component palette configuration.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@47230 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: Update component list to match the layout of component palette, triggered when window is activated.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@47231 4005530d-fff6-0310-9dd1-cebe43e6787f