Request patch testing please

I added a KControl check box control for the shutdown feedback dialog. The one that says "Saving your settings" when logging out.

The underlying support already existed. The check box merely adds a direct way for users to show or disable the dialog box.

The patch provides nominal temporary relief against bug report 922: "When logging out with unsaved file, trinity does not ask to save it," (http://bugs.pearsoncomputing.net/show_bug.cgi?id=922). Currently the only solution to that bug is a work-around of disabling the feedback dialog.

The patch is available through bug report 681 (http://bugs.pearsoncomputing.net/show_bug.cgi?id=681).

Please test. Upon receiving a successful report I'll push to GIT.

Thanks for helping. :)

Darrell