Bug 938177 - Browser Settings Moved to System Settings

Duplicates browser app's settings in Settings. Browser app is apparently
being deleted, so modifications there likely do not matter.
Is there any particular reason we have changes to the browser app? Since it's going to be hidden in 2.1, can we simply revert these changes? Kyle is doing some work to remove it, and I would prefer to avoid conflicting with his changes if possible. Sorry about the mis-communication here =(