[extensions-web] extension: hide upgrade button for not installed extensions

[Yuri Konotopov <ykonotopov src gnome org>]

commit 0971c81f0f6935fa21fa5fb435e3d43d70c0535d
Author: Yuri Konotopov <ykonotopov gnome org>
Date:   Mon Feb 6 12:19:57 2017 +0400

    extension: hide upgrade button for not installed extensions

 sweettooth/static/js/extensions.js |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/sweettooth/static/js/extensions.js b/sweettooth/static/js/extensions.js
index 6a127be..dae5b5a 100644
--- a/sweettooth/static/js/extensions.js
+++ b/sweettooth/static/js/extensions.js
@@ -133,8 +133,11 @@ function($, messages, dbusProxy, extensionUtils, templates) {
 
         var svm = meta.shell_version_map || $elem.data('svm');
         var latest = extensionUtils.grabProperExtensionVersion(svm, dbusProxy.ShellVersion);
-        if (latest !== null && (!meta.version || latest.version > meta.version || _state === 
ExtensionState.OUT_OF_DATE))
+        if (_state !== ExtensionState.UNINSTALLED && latest !== null &&
+            (!meta.version || latest.version > meta.version || _state === ExtensionState.OUT_OF_DATE))
+        {
             $elem.addClass('upgradable');
+        }
 
         function sendPopularity(action) {
             $.ajax({ url: '/ajax/adjust-popularity/',