relax SVN archive

The desc_short rather than wiz_desc arg is now used for the GUI elements.

This is for the auto-generated user functions.

The wiz_desc arg is no longer compulsory for the auto-generated user functions.

This will eventually be merged with the desc_short arg anyway.

The GUI test execute_uf() base method now operates with the auto-generated user functions.

Removed the Page_storage singleton object as the idea does not work.

While the pages cannot be recycled, a fundamental problem is if a wizard with the page is run at
the same time as the user function page. More than one copy of the page must exist at the same
time!

Advancements for the auto-generated GUI user functions.

String list GUI elements are now supported. The wizard element are now updated on display, allowing
for example the current set of data pipes to be displayed in the ComboBoxes of the pipe user
functions.

The List and Combo_list class now have ResetChoices() methods.

This allows these elements to fit with the auto-generated GUI user functions.

Big set of changes enabling the auto-generation of the GUI user function front ends.

This will create user function objects which are bound to the menu items, and the user function page
objects automatically from the user_function data object. The pipe user functions have been updated
to supply the needed data, and additional arguments have been added to the Uf_container.add_keyarg()
method. The Uf_container object can now accept additional wizard related variables.

The graphics package image variables are now imported into the paths module.

This is for backwards compatibility with the old user function pages.

Shifted a number of the image path variables from the gui.paths module to the graphics package.

Whitespace fix.