relax SVN archive

Reverted r13999 as this was incorrect - the description height is being set.

The command used was:
svn merge -r13999:13998 .

The height_desc class variable is now respected in the user function base class.

This will allow the description height to be changed.

Polishing of the Question message dialog.

The buttons are now of fixed width and aligned to the right, and the relax-blue version of the
dialog-warning oxygen icon is being used.

Created a relax blue version of the dialog-warning oxygen icon.

Layout improvements in a number of user function and other wizard pages.

The description heights are now used (the variable had been renamed), and the free file format
GUI element containing user function pages now use the space better and have been shortened.

The free file format resetting now properly updates the GUI element.

Polishing of the free file format GUI element.

The internal buttons are now placed to the right hand side rather than below to save large amounts
of space. A lot of unnecessary outside padding has also been removed, and the divider position is
now properly calculated.

Updates to the fonts, and the addition of normal_italic.

Improvements to the wildcards for the relax save state file dialogs.

There is now a separation between the compressed *.bz2 *.gz files and the 'All files' entry for
selecting an uncompressed version.

The protected_exec() function now uses gui_raise() to handle errors.