Fix for elementary#529 Appcenter sometimes opens the updates view.

This also fix an issue where installed apps would not show up if your did not open the AppListUpdateView until the update worker ended.

src/Application.vala

@@ -225,6 +225,7 @@ public class AppCenter.App : Gtk.Application {
 
         if (show_updates) {
             ((MainWindow) active_window).go_to_installed ();
+            show_updates = false;
         }
 
         active_window.present ();

src/MainWindow.vala

@@ -145,6 +145,14 @@ public class AppCenter.MainWindow : Gtk.ApplicationWindow {
         backend.notify["job-type"].connect (update_overlaybar_label);
 
         overlaybar.label = backend.job_type.to_string ();
+
+        if (installed_view == null) {
+            installed_view = new Views.AppListUpdateView ();
+
+            installed_view.show_app.connect ((package) => {
+                show_package (package);
+            });
+        }
     }
 
     public override bool close_request () {
@@ -192,14 +200,6 @@ public class AppCenter.MainWindow : Gtk.ApplicationWindow {
     }
 
     public void go_to_installed () {
-        if (installed_view == null) {
-            installed_view = new Views.AppListUpdateView ();
-
-            installed_view.show_app.connect ((package) => {
-                show_package (package);
-            });
-        }
-
         if (installed_view.parent != null) {
             navigation_view.pop_to_page (installed_view);
         } else {