[gnome-software/gnome-3-26] Release version 3.26.7

[Kalev Lember <klember src gnome org>]

commit abe2bf7877cbffb21745e52480557d3c0e73622f
Author: Kalev Lember <klember redhat com>
Date:   Fri Mar 2 13:55:04 2018 +0100

    Release version 3.26.7

 NEWS                                           | 18 ++++++++++++++++++
 data/appdata/org.gnome.Software.appdata.xml.in | 20 ++++++++++++++++++++
 2 files changed, 38 insertions(+)
---
diff --git a/NEWS b/NEWS
index 03ae5d85..1b1ece88 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,21 @@
+Version 3.26.7
+~~~~~~~~~~~~~~
+Released: 2018-03-02
+
+This is a stable release with the following changes:
+ * Use less space on low resolution displays
+ * Hide invalid apps we don't know how to install
+ * Rate limit distro upgrade notifications once per week
+ * Make category name sorting case insensitive
+ * Add back install buttons to codec install view
+ * Update flatpak remote metadata when refreshing
+ * Remove fedora-tagger-usage plugin
+ * Various correctness and warning fixes
+ * Various fixes to the external appstream plugin
+ * Various fixes to the snap plugin
+
+This release also updates translations.
+
 Version 3.26.6
 ~~~~~~~~~~~~~~
 Released: 2018-02-08
diff --git a/data/appdata/org.gnome.Software.appdata.xml.in b/data/appdata/org.gnome.Software.appdata.xml.in
index deb53052..732a6dcb 100644
--- a/data/appdata/org.gnome.Software.appdata.xml.in
+++ b/data/appdata/org.gnome.Software.appdata.xml.in
@@ -46,6 +46,26 @@
    Validate with `appstream-util validate *.appdata.xml`
   -->
   <releases>
+    <release date="2018-03-02" version="3.26.7">
+      <description>
+        <p>
+          This is a stable release with the following changes:
+        </p>
+        <ul>
+          <li>Use less space on low resolution displays</li>
+          <li>Hide invalid apps we don't know how to install</li>
+          <li>Rate limit distro upgrade notifications once per week</li>
+          <li>Make category name sorting case insensitive</li>
+          <li>Add back install buttons to codec install view</li>
+          <li>Update flatpak remote metadata when refreshing</li>
+          <li>Remove fedora-tagger-usage plugin</li>
+          <li>Various correctness and warning fixes</li>
+          <li>Various fixes to the external appstream plugin</li>
+          <li>Various fixes to the snap plugin</li>
+        </ul>
+        <p>This release also updates translations.</p>
+      </description>
+    </release>
     <release date="2018-02-08" version="3.26.6">
       <description>
         <p>