placeholder function

ipa_target_section does not overload is_dirty, and it alwayrs returns true, meaning you can never leave the page once you visit it.

THis commit pushes a simple placeholder function that always returns fales.  Follow on work will be required to correctly inplement the is_dirty functonality

install/ui/aci.js

@@ -602,6 +602,8 @@ IPA.target_section = function () {
             record.filter = filter;
         }
     };
+    that.is_dirty = function (){ return false; }
+
     return that;
 };