Update appdata.

org.eu.encom.spectral.appdata.xml

@@ -13,18 +13,17 @@
       Spectral is a glossy cross-platform client for Matrix, the decentralized communication protocol for instant messaging.
     </p>
     <p>
-      The source code is generally available at https://gitlab.com/b0/spectral
+      The source code is available at https://gitlab.com/b0/spectral
     </p>
   </description>
 
   <url type="homepage">https://gitlab.com/b0/spectral</url>
   <url type="bugtracker">https://gitlab.com/b0/spectral/issues</url>
-  <url type="help">https://doc.spectral.encom.eu.org</url>
+  <url type="help">https://b0.gitlab.io/spectral-doc</url>
 
   <categories>
     <category>Matrix</category>
     <category>Internet</category>
-    <category>Qt</category>
   </categories>
 
   <developer_name>Black Hat</developer_name>
@@ -37,9 +36,17 @@
       <image>https://gitlab.com/b0/spectral/raw/master/screenshots/1.png</image>
     </screenshot>
     <screenshot>
-      <caption>Room Config</caption>
+      <caption>Room Timeline</caption>
       <image>https://gitlab.com/b0/spectral/raw/master/screenshots/2.png</image>
     </screenshot>
+    <screenshot>
+      <caption>Room Config</caption>
+      <image>https://gitlab.com/b0/spectral/raw/master/screenshots/3.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Settings</caption>
+      <image>https://gitlab.com/b0/spectral/raw/master/screenshots/4.png</image>
+    </screenshot>
   </screenshots>
 
   <content_rating type="oars-1.0">
@@ -48,6 +55,7 @@
   </content_rating>
 
   <releases>
+    <release version="603" date="2019-05-01"></release>
     <release version="464" date="2018-10-24"></release>
     <release version="462" date="2018-10-24"></release>
     <release version="436" date="2018-10-20"></release>