Clean up explicit format loading

[SteveDoyle2]

The title of the gui should be:

• Nastran - filename
• AFLR2 / AFLR3 ugrid (2D) - filename
• AFLR3 ugrid (3D) - filename
• AFLR2 BEdge - filename

while the format is:

• nastran
• ugrid
• ugrid3d
• bedge

respectively.

This requires another argument to the get_*_wildcard_geometry_results_functions, which is the description.

    data = (
        'AFLR2 BEdge',
        'AFLR2 BEdge (*.bedge)', self.load_bedge_geometry,
        None, None)

becomes:

    data = (
        'bedge', 'AFLR2 BEdge',
        'AFLR2 BEdge (*.bedge)', self.load_bedge_geometry,
        None, None)