Make images loaded lazily on the repo tags page, as they will not be needed in the read-only (common) case.

static/js/directives/repo-view/repo-panel-tags.js

@@ -13,6 +13,8 @@ angular.module('quay').directive('repoPanelTags', function () {
       'selectedTags': '=selectedTags',
       'imagesResource': '=imagesResource',
       'images': '=images',
+
+      'getImages': '&getImages'
     },
     controller: function($scope, $element, $filter, $location, ApiService, UIService) {
       var orderBy = $filter('orderBy');