IDE: Fix crash in Component List when selecting a component from an uninitialized page. Issue #27174.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@47215 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: Show and save also empty pages in the component palette configuration.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@47216 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: Explode a with-block in code creating component palette buttons. Revealed a bug with PopupMenu.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@47217 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: Force update for all component palette pages after changing configuration.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@47218 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: PopupMenu for renaming and deleting pages in component palette config.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@47219 4005530d-fff6-0310-9dd1-cebe43e6787f