relax SVN archive

Removed the 'Settings->Reset all settings' menu and added a reset button to the free file format settings.

The only settings being reset were the free file format ones, so this has moved into that GUI element.

The Question class can now have the parent specified to allow for sub-windows to have the dialog focus.

The edit-delete oxygen icons are now more complete.

Fix for the wizard apply icon.

The missing data and question dialogs are now centred.

Converted the question() dialog launching function into a class derived from wx.Dialog.

This implements a custom yes/no dialog that is consistent between different operating systems.

Modified all the paths to the dialog-* oxygen icons to start with dialog_*.

Fix for the path to the dialog-warning oxygen icon.

Layout improvements for the wizard pages on Mac OS X.

Fix for the split/double help menu entry on Mac OS X.

The SetMenuBar() call happens after all the menus are created.