AppManager: improve installation status page

* Status is refreshed in the background
* Render release item infos instead of internal names

Change-Id: I63a6082656e4e6772a4b5c734c5dd5c23141f70b
diff --git a/core/installer/welcome/static/appmanager.css b/core/installer/welcome/static/appmanager.css
index d5015f5..2f3564f 100644
--- a/core/installer/welcome/static/appmanager.css
+++ b/core/installer/welcome/static/appmanager.css
@@ -220,3 +220,15 @@
   margin: 0;
   padding: 0;
 }
+
+.progress {
+  padding-left: 0;
+}
+
+.progress ul {
+  padding-left: 15px;
+}
+
+.progress li {
+  list-style-type: none;
+}