[gnome-software] Release version 3.28.1

[Kalev Lember <klember src gnome org>]

commit 59160c4d7726f46f726da3002713daec5e50aa2e
Author: Kalev Lember <klember redhat com>
Date:   Mon Apr 9 23:50:56 2018 +0200

    Release version 3.28.1

 NEWS                                           | 23 +++++++++++++++++++++++
 data/appdata/org.gnome.Software.appdata.xml.in | 25 +++++++++++++++++++++++++
 2 files changed, 48 insertions(+)
---
diff --git a/NEWS b/NEWS
index 1521fb51..63705331 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,26 @@
+Version 3.28.1
+~~~~~~~~~~~~~~
+Released: 2018-04-09
+
+This is a stable release with the following changes:
+ * Fix a regression with opening results from gnome-shell search
+ * Show "Source: " tag in gnome-shell search when we have multiple matches
+ * Improve unknown license tag color scheme on details page
+ * Don't show installed icon on app tiles while still installing
+ * Fix empty items appearing under OS Updates
+ * Fix a regression that caused duplicate results in codec search
+ * Fix an issue with passing username/password to packagekit proxy
+ * Avoid crashing during first run with no network access
+ * A number of rpm-ostree fixes, making it possible to trigger offline updates
+ * Stop searching multiple times on search page
+ * Update Fedora third party repositories "Find out more..." link
+ * Fix an issue with in-app notifications failing with invalid markup errors
+ * Improve purchase failure handling for the snap store
+ * Fix a possible crash in snap plugin when adding screenshots
+ * Various other crash and correctness fixes
+
+This release also updates translations.
+
 Version 3.28.0
 ~~~~~~~~~~~~~~
 Released: 2018-03-12
diff --git a/data/appdata/org.gnome.Software.appdata.xml.in b/data/appdata/org.gnome.Software.appdata.xml.in
index 1f452d2e..6237d34f 100644
--- a/data/appdata/org.gnome.Software.appdata.xml.in
+++ b/data/appdata/org.gnome.Software.appdata.xml.in
@@ -46,6 +46,31 @@
    Validate with `appstream-util validate *.appdata.xml`
   -->
   <releases>
+    <release date="2018-04-09" version="3.28.1">
+      <description>
+        <p>
+          This is a stable release with the following changes:
+        </p>
+        <ul>
+          <li>Fix a regression with opening results from gnome-shell search</li>
+          <li>Show "Source: " tag in gnome-shell search when we have multiple matches</li>
+          <li>Improve unknown license tag color scheme on details page</li>
+          <li>Don't show installed icon on app tiles while still installing</li>
+          <li>Fix empty items appearing under OS Updates</li>
+          <li>Fix a regression that caused duplicate results in codec search</li>
+          <li>Fix an issue with passing username/password to packagekit proxy</li>
+          <li>Avoid crashing during first run with no network access</li>
+          <li>A number of rpm-ostree fixes, making it possible to trigger offline updates</li>
+          <li>Stop searching multiple times on search page</li>
+          <li>Update Fedora third party repositories "Find out more..." link</li>
+          <li>Fix an issue with in-app notifications failing with invalid markup errors</li>
+          <li>Improve purchase failure handling for the snap store</li>
+          <li>Fix a possible crash in snap plugin when adding screenshots</li>
+          <li>Various other crash and correctness fixes</li>
+        </ul>
+        <p>This release also updates translations.</p>
+      </description>
+    </release>
     <release date="2018-03-12" version="3.28.0">
       <description>
         <p>