[gimp/gimp-2-10] desktop: start a <release> tag for 2.10.4.

[Jehan <jehanp src gnome org>]

commit dc8f44c6fa00b1dd1a2c3bfc208bae8dd0a2b7ab
Author: Jehan <jehan girinstud io>
Date:   Thu Jun 14 16:17:41 2018 +0200

    desktop: start a <release> tag for 2.10.4.
    
    The 2 major changes seem to be the much-awaited font loading in
    background, and this new "Auto straighten" option on Measurement tool.
    
    Please everyone, feel free to tweak the release description while it is
    still commented out. Once we remove the comment tags, it will be
    submitted for translation.

 desktop/org.gimp.GIMP.appdata.xml.in.in | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
---
diff --git a/desktop/org.gimp.GIMP.appdata.xml.in.in b/desktop/org.gimp.GIMP.appdata.xml.in.in
index 57c47a0084..1ccf5a316b 100644
--- a/desktop/org.gimp.GIMP.appdata.xml.in.in
+++ b/desktop/org.gimp.GIMP.appdata.xml.in.in
@@ -72,6 +72,27 @@
   </provides>
 
   <releases>
+    <!--
+    <release version="2.10.4" date="TODO">
+      <description>
+        <_p>
+          GIMP 2.10.4 includes a lot of bug fixes as well as various
+          optimizations. In particular fonts loading is not blocking
+          startup anymore. Instead any feature using fonts (such as the
+          Text tool) will now be blocked until fonts are fully loaded.
+          This change was highly requested on some platforms where font
+          loading was sometimes painfully slow.
+        </_p>
+        <_p>
+          The Measurement tool is augmented with a new feature, "Auto
+          straighten", allowing to rotate the active drawable (layer,
+          channel…) with the measurement line used as horizon.
+          As other transform tools, the feature will work on linked
+          drawables as well.
+        </_p>
+      </description>
+    </release>
+    -->
     <release version="2.10.2" date="2018-05-20">
       <description>
         <_p>