working on U4-4011 Package installation will require either a full app refresh or we will need to re-lazy load in all of the assets but unfortunately we cannot lazy load in things like directives as angular doesn't like that, we have to re-load the browser.

src/Umbraco.Web.UI.Client/lib/umbraco/LegacyUmbClientMgr.js

@@ -364,6 +364,12 @@ Umbraco.Sys.registerNamespace("Umbraco.Application");
                     getRootScope().$emit("app.closeDialogs", undefined);
                 }                
             },
+            /* This is used for the package installer to call in order to reload all app assets so we don't have to reload the window */
+            _packageInstalled: function() {
+                var injector = getRootInjector();
+                var packageHelper = injector.get("packageHelper");
+                packageHelper.packageInstalled();
+            },
             _debug: function(strMsg) {
                 if (this._isDebug) {
                     Sys.Debug.trace("UmbClientMgr: " + strMsg);

src/Umbraco.Web.UI.Client/src/common/directives/umbsections.directive.js

@@ -65,6 +65,11 @@ function sectionsDirective($timeout, $window, navigationService, treeService, se
 			        scope.currentSection = args.value;
 			    }
 			});
+            
+			eventsService.on("app.reInitialize", function (e, args) {
+                //re-load the sections if we're re-initializing (i.e. package installed)
+			    loadSections();
+			});
 
 			//on page resize
 			window.onresize = calculateHeight;

src/Umbraco.Web.UI.Client/src/common/services/assets.service.js

@@ -41,7 +41,7 @@
  * </pre>  
  */
 angular.module('umbraco.services')
-.factory('assetsService', function ($q, $log, angularHelper, umbRequestHelper, $rootScope) {
+.factory('assetsService', function ($q, $log, angularHelper, umbRequestHelper, $rootScope, $http) {
 
     var initAssetsLoaded = false;
 
@@ -71,6 +71,23 @@ angular.module('umbraco.services')
             return deferred.promise;
         },
 
+        /** Internal method. This is used after installing a package to reload the application assets so we don't have to reload the whole window */
+        _reloadApplicationAssets: function() {
+
+            umbRequestHelper.resourcePromise(
+                $http.get(umbRequestHelper.getApiUrl("manifestAssetList", "", "")),
+                'Failed to get manifest list').then(function(data) {
+
+                    //ok so we have the list of assets, now we'll use yepnope to go get them. Anything that is already loaded should remain loaded
+                    // and this should just load anything that is newly installed.
+                    
+                    yepnope({
+                        load: data
+                    });
+
+                });
+        },
+
         /**
          * @ngdoc method
          * @name umbraco.services.assetsService#loadCss

src/Umbraco.Web.UI.Client/src/common/services/events.service.js

@@ -65,7 +65,7 @@ function eventsService($q, $rootScope) {
 		    return $rootScope.$on(name, callback);
 		},
 		
-        /** pass in the result of subscribe to this method, or just call the method returned from subscribe to unsubscribe */
+        /** pass in the result of 'on' to this method, or just call the method returned from 'on' to unsubscribe */
 		unsubscribe: function(handle) {
 		    if (angular.isFunction(handle)) {
 		        handle();

src/Umbraco.Web.UI.Client/src/common/services/util.service.js

@@ -1,5 +1,21 @@
 /*Contains multiple services for various helper tasks */
 
+function packageHelper(assetsService, treeService, eventsService) {
+
+    return {
+
+        /** Called when a package is installed, this resets a bunch of data and ensures the new package assets are loaded in */
+        packageInstalled: function () {
+            assetsService._reloadApplicationAssets();
+            treeService.clearCache();
+            //send event
+            eventsService.emit("app.reInitialize");
+        }
+
+    };
+}
+angular.module('umbraco.services').factory('packageHelper', packageHelper);
+
 function umbPhotoFolderHelper($compile, $log, $timeout, $filter, imageHelper, umbRequestHelper) {
     return {
         /** sets the image's url - will check if it is a folder or a real image */