[gimp] NEWS, desktop: small fixes in NEWS and in <release> appdata.

[Jehan Pagès <jehanp src gnome org>]

commit 12ec7976d5ff9815c1371f24f3ccf8715587813d
Author: Jehan <jehan girinstud io>
Date:   Wed Apr 11 01:15:52 2018 +0200

    NEWS, desktop: small fixes in NEWS and in <release> appdata.

 NEWS                                    |    5 +++--
 desktop/org.gimp.GIMP.appdata.xml.in.in |   11 ++++++-----
 2 files changed, 9 insertions(+), 7 deletions(-)
---
diff --git a/NEWS b/NEWS
index bb68119..6c417d8 100644
--- a/NEWS
+++ b/NEWS
@@ -30,8 +30,9 @@ Core:
 
 User interface:
 
-  - Lighter and Grey themes remove for now, Dark theme rewritten from
-    scratch to get rid of various usability issues and glitches.
+  - Lighter and Darker themes removed for now, Light and Dark themes
+    rewritten from scratch to get rid of various usability issues and
+    glitches. Only Gray theme from previous set kept as-is.
   - New GimpToolGyroscope on-canvas control, currently used for
     the Panorama Projection filter. The widget provides on-canvas
     interaction for 3D rotation (yaw, pitch, roll).
diff --git a/desktop/org.gimp.GIMP.appdata.xml.in.in b/desktop/org.gimp.GIMP.appdata.xml.in.in
index 95fe866..42a8386 100644
--- a/desktop/org.gimp.GIMP.appdata.xml.in.in
+++ b/desktop/org.gimp.GIMP.appdata.xml.in.in
@@ -138,15 +138,16 @@
           including parallelized painting code.</_li>
           <_li>Symmetries are now preserved in XCF files (saved as image
           parasites).</_li>
-          <_li>Light and Dark themes rewritten from scratch to get rid
-          of various usability issues</_li>
+          <_li>"Light" and "Dark" themes rewritten from scratch to get
+          rid of various usability issues. "Lighter" and "Darker" themes
+          removed.</_li>
           <_li> New GimpToolGyroscope on-canvas control, currently used
           for the Panorama Projection filter. The widget provides
           on-canvas interaction for 3D rotation (yaw, pitch, roll).</_li>
-          <_li>Plug-ins debugging improved to output stack traces from
+          <_li>Plug-in debugging improved to output stack traces from
           plug-ins with --stack-trace-mode command line option not only
-          on receiving signals but also when "fatal-warnings" debug key
-          is set.</_li>
+          on receiving signals but also on warnings and critical errors
+          when "fatal-warnings" debug key is set.</_li>
         </ul>
         <_p>For more information, see https://www.gimp.org/news/2018/04/14/gimp-2-10-rc2-released/</_p>
       </description>