relax SVN archive

Converting back to having back_calc as a function argument to model B14.

This is to clean up the API.
There can be bo no partial measures/implementations in the relax trunk.

The problem is, that many numerical models can't be optimised further, since they
evolve the spin-magnetisation in a matrix. That spin evolvement can't be put into
a larger numpy array.

This is related to: task #7793: (https://gna.org/task/?7793) Speed-up of dispersion models.

Bug fixes for the Sequence GUI element used for lists in the user function windows.

Invalid values input into the Sequence GUI window are now ignored rather than raising different
types of error. And invalid input lists for fixed dimension arguments are also ignored. This
allows the User_functions.test_structure_add_atom GUI test to pass.

Modified the 'pos' argument of the structure.add_atom user function.

The argument is now a list of fixed length of 3, and it has the titles 'X coordinate',
'Y coordinate', and 'Z coordinate' which are shown in the GUI.

Small fix for switched indices in the new User_functions.test_structure_add_atom GUI test.

Titles are now handled and set in the Sequence GUI element.

The titles will replace the numbering of 1 onwards in the first column of the GUI element.

Created the User_functions.test_structure_add_atom GUI test.

This is used to check the operation of the Sequence GUI element via the 'pos' argument of the
structure.add_atom user function. This is a list fixed to 3 elements.

The self.variable_length flag is used in one more spot in the Sequence_2D GUI element.

The self.variable_length flag is now used throughout the Sequence GUI element.

Added list titles for the dx.map user function point argument.

This is so that the Sequence_2D GUI element will have column titles of 'X coordinate',
'Y coordinate', and 'Z coordinate'.

Increased the width of the first column of the Sequence_2D GUI element for variable lists.

This is so the column title "Number" will fit.