Finished implenting custom browser support

With this change, another localized string for OTHER_BROWSER will be
needed as well.

I've also set the project to use 2 spaces for tabs by default since that
is the coding style you use in the project.

MacPass.xcodeproj/project.pbxproj

@@ -1510,7 +1510,9 @@
 				4C77E36515B84A240093A587 /* Frameworks */,
 				4C77E36315B84A240093A587 /* Products */,
 			);
+			indentWidth = 2;
 			sourceTree = "<group>";
+			tabWidth = 2;
 		};
 		4C77E36315B84A240093A587 /* Products */ = {
 			isa = PBXGroup;