"Enable Traditional Bridge" setting in GUI tool should not be editable

[mattl91]

If you double-click the "Enable Traditional Bridge" setting (on the Traditional Bridge screen in the GUI tool), a "Enter New Value" window opens, enabling you to edit this setting (e.g., change it from false to true). But if you do that and click OK, you'll get an error ("Failed to set text..."). This field should not be editable.