Fix hidden event keys being incorrectly shown in the even info dialog.

webclient/room/room-controller.js

@@ -1004,7 +1004,11 @@ angular.module('RoomController', ['ngSanitize', 'matrixFilter', 'mFileInput'])
     };
 
     $scope.openJson = function(content) {
-        $scope.event_selected = content;
+        $scope.event_selected = angular.copy(content);
+        
+        // FIXME: Pre-calculated event data should be stripped in a nicer way.
+        $scope.event_selected.room_member = undefined;
+        
         // scope this so the template can check power levels and enable/disable
         // buttons
         $scope.pow = eventHandlerService.getUserPowerLevel;