Improve contact module models

- Fixed reset behavior
- Created an abstract state for the card viewer and editor
- Moved the card instance from the $rootScope.addressbook to the $scope

UI/WebServerResources/js/Common/ui-desktop.js

@@ -18,7 +18,7 @@
    * @param {string} content
    */
   Dialog.alert = function(title, content) {
-    var modal = this.$modal.open({
+    this.$modal.open({
       template:
       '<h2 data-ng-bind-html="title"></h2>' +
         '<p data-ng-bind-html="content"></p>' +