Add a comment why we return an int.

git-svn-id: http://tortoisesvn.googlecode.com/svn/trunk@25844 4cfb86a4-2c7a-11df-bd14-c1e331e6ceac
Change the text of the group box, and add a label explaining what the checkboxes actually do.

git-svn-id: http://tortoisesvn.googlecode.com/svn/trunk@25845 4cfb86a4-2c7a-11df-bd14-c1e331e6ceac