relax SVN archive

Removed all of the dir user function args in the BMRB GUI test.

These need to be part of the file argument, as the file and dir args are merged into one GUI
file selection element.

The Combo_list GUI input element SetValue() method now handles single values and lists.

This is required for the GUI tests.

The ComboBox data values are now set to the choices in the __init__() method if not given.

This is required by the GUI tests, as the ResetChoices() method which does the same thing has not
been called.

Shifted the combo_list GUI element into the gui.input_elements package.

Fix for the Sequence_2D GUI element for when the first dimension is variable but the second is fixed.

This allows the bmrb.citation GUI user function 'authors' argument element to be functional.

Another missing import, accidentally deleted.

Reintroduced some accidentally deleted imports.

Fix for the table in the spectrum.error_analysis user function description.

There was a lot of whitespace in front of the first element of the table!

Fix for the GUI test execute_uf() method - the user function page is now updated prior to execution.

This call to the user function page on_display() method allows the read only ComboBoxes to be filled
with the allowed values. The subsequent SetValue() call will then choose the element from the list,
rather than having the element left to the value of None.

The NOE auto-analysis GUI test has been converted to the new auto-generated user function design.