relax SVN archive

Renamed the uf_gui observer object to gui_uf.

The data pipe editor is now registered with the gui_analysis observer.

The observer status.observers.gui_analysis is now notified of all changes to the analysis tabs.

Created an observer object for changes to the GUI analysis tabs.

The execution of the callback functions in the observer objects is now ordered.

This is based on the registration order.

Fix for the relaxation data list GUI element - the frequency value was being set to the wrong col.

Fixes for the grid GUI elements - the first row which is not deleted is now being cleared of all text.

The data pipe editor can now be opened with Ctrl+D.

Fix for the popup menu in the data pipe editor - the row and column were swapped.

Fixed an accidentally deleted import of the status object.