Add shorthand 'tr' filter for translation

src/js/index.js

@@ -118,6 +118,34 @@ app.config(['$routeProvider', function ($routeProvider) {
     }).otherwise({ redirectTo: '/'});
 }]);
 
+
+// Add shorthand "tr" filter to avoid having ot use "translate"
+// This is a copy of the code at https://github.com/angular-translate/angular-translate/blob/master/src/filter/translate.js
+// If we find out how to get that function handle somehow dynamically we can use that, otherwise the copy is required
+function translateFilterFactory($parse, $translate) {
+
+  'use strict';
+
+  var translateFilter = function (translationId, interpolateParams, interpolation, forceLanguage) {
+    if (!angular.isObject(interpolateParams)) {
+      var ctx = this || {
+        '__SCOPE_IS_NOT_AVAILABLE': 'More info at https://github.com/angular/angular.js/commit/8863b9d04c722b278fa93c5d66ad1e578ad6eb1f'
+        };
+      interpolateParams = $parse(interpolateParams)(ctx);
+    }
+
+    return $translate.instant(translationId, interpolateParams, interpolation, forceLanguage);
+  };
+
+  if ($translate.statefulFilter()) {
+    translateFilter.$stateful = true;
+  }
+
+  return translateFilter;
+}
+translateFilterFactory.displayName = 'translateFilterFactory';
+app.filter('tr', translateFilterFactory);
+
 app.filter('installError', function () {
     return function (app) {
         if (!app) return false;