Updated the translations and the appstream-file.

NEWS.md

@@ -1,4 +1,4 @@
-#Current
+#20.04.0
  * Resolved a crash on right-clicking a GroupCell
  * Help works again in the german translation
  * View/Invert worksheet brightness now toggles an instant dark worksheet mode
@@ -7,6 +7,7 @@
  * Corrected the initial slideshow size
  * An Ukrainian translation update from Yuri Chornoivan
  * A Russian translation update from OlesyaGerasimenko
+ * A more stable language selection mechanism
  * Extended the "fitting data" example
  * A example on how to iterate through lists efficiently
  * Many spelling corrections and better formulations

data/io.github.wxmaxima_developers.wxMaxima.appdata.xml

@@ -51,6 +51,29 @@
     <content_attribute id="social-info">mild</content_attribute>
   </content_rating>
   <releases>
+    <release version="20.04.0" date="2020-04-18">
+      <description>
+	<p>
+	  MacOS X compatibility, tons of bugfixes and many new features.
+	</p>
+        <ul>
+	  <li>Resolved a crash on right-clicking a GroupCell</li>
+	  <li>Help works again in the german translation</li>
+	  <li>View/Invert worksheet brightness now toggles an instant dark worksheet mode</li>
+	  <li>Removed an unnecessary info dialogue on startup</li>
+	  <li>Right-click-suggestions for similar command names</li>
+	  <li>Corrected the initial slideshow size</li>
+	  <li>An Ukrainian translation update from Yuri Chornoivan</li>
+	  <li>A Russian translation update from OlesyaGerasimenko</li>
+	  <li>A more stable language selection mechanism</li>
+	  <li>Extended the "fitting data" example</li>
+	  <li>A example on how to iterate through lists efficiently</li>
+	  <li>Many spelling corrections and better formulations</li>
+	  <li>A big number of small bug-fixes</li>
+	  <li>Another noticeable SpeedUp</li>
+        </ul>
+      </description>
+    </release>
     <release version="20.03.1" date="2020-03-15">
       <description>
 	<p>