X Axis / Y Axis / Z Axis buttons not useful for Line source
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
When you create a Line source, the [X|Y|Z] Axis buttons are not useful. They fill the point coordinate entry boxes with garbage values. This is happening because this widget needs an input dataset so it can use its bounds in setting the values from the [X|Y|Z] Axis buttons. These buttons should either be removed from the GUI for the Line source, or we should create default values for the widget to use when there is no input dataset.