If enabled, allow users and orgs to set their time machine expiration

Fixes https://www.pivotaltracker.com/story/show/142881203

static/js/core-config-setup.js

@@ -21,6 +21,8 @@ angular.module("core-config-setup", ['angularFileUpload'])
 
           {'id': 'registry-storage', 'title': 'Registry Storage'},
 
+          {'id': 'time-machine', 'title': 'Time Machine'},
+
           {'id': 'ssl', 'title': 'SSL certificate and key', 'condition': function(config) {
             return config.PREFERRED_URL_SCHEME == 'https';
           }},
@@ -826,7 +828,8 @@ angular.module("core-config-setup", ['angularFileUpload'])
         'binding': '=binding',
         'placeholder': '@placeholder',
         'defaultValue': '@defaultValue',
-        'itemTitle': '@itemTitle'
+        'itemTitle': '@itemTitle',
+        'itemPattern': '@itemPattern'
       },
       controller: function($scope, $element) {
         $scope.removeItem = function(item) {
@@ -853,6 +856,20 @@ angular.module("core-config-setup", ['angularFileUpload'])
           $scope.newItemName = null;
         };
 
+        $scope.patternMap = {};
+
+        $scope.getRegexp = function(pattern) {
+          if (!pattern) {
+            pattern = '.*';
+          }
+
+          if ($scope.patternMap[pattern]) {
+            return $scope.patternMap[pattern];
+          }
+
+          return $scope.patternMap[pattern] = new RegExp(pattern);
+        };
+
         $scope.$watch('binding', function(binding) {
           if (!binding && $scope.defaultValue) {
             $scope.binding = eval($scope.defaultValue);