Add dateFormat choice to charts and other hardcoded MM/DD/YYYY

public/js/controllers/groupsCtrl.js

@@ -111,7 +111,7 @@ habitrpg.controller("GroupsCtrl", ['$scope', '$rootScope', 'Shared', 'Groups', '
   .controller("MemberModalCtrl", ['$scope', '$rootScope', 'Members', 'Shared', '$http', 'Notification', 'Groups',
     function($scope, $rootScope, Members, Shared, $http, Notification, Groups) {
       $scope.timestamp = function(timestamp){
-        return moment(timestamp).format('MM/DD/YYYY');
+        return moment(timestamp).format(User.user.preferences.dateFormat.toUpperCase());
       }
       // We watch Members.selectedMember because it's asynchronously set, so would be a hassle to handle updates here
       $scope.$watch( function() { return Members.selectedMember; }, function (member) {

public/js/controllers/rootCtrl.js

@@ -166,7 +166,7 @@ habitrpg.controller("RootCtrl", ['$scope', '$rootScope', '$location', 'User', '$
       }
       matrix = [['Date', 'Score']];
       _.each(history, function(obj) {
-        matrix.push([moment(obj.date).format('MM/DD/YY'), obj.value]);
+        matrix.push([moment(obj.date).format(User.user.preferences.dateFormat.toUpperCase()), obj.value]);
       });
       data = google.visualization.arrayToDataTable(matrix);
       options = {