Update changelog for new groups stuff and the fixes for contacts management

CHANGELOG.md

@@ -6,11 +6,19 @@
     * The "copy text" action now copies the plain text not HTML version. So things like hashtags
       show up as "#hashtag" not the HTML code around it with the link reference etc.
     * Clicking on the "Home" button if you already are on that screen scrolls to the top.
-    * Auto-fill suggestions render at the top of the edit text field not bottom.
+    * Auto-complete suggestions for hashtags and accounts render at the top of the edit text field not bottom.
+    * Contacts screen shows user's handle and last post time (as far as your server knows about) for the user
 * Fixes
+    * Seemingly disappearing contacts on Contacts screen have been corrected.
 * New Features
     * Responsive design for allowing the image and video attachments to scale up for larger videos
-      but limit content width on very large screens.
+      but limit timeline/list width on very large screens.
+    * Groups (Mastodon Lists) management including:
+        * Creating new groups
+        * Renaming groups
+        * Deleting groups
+        * Add users to groups
+        * Remove users from groups
 
 ## Version 0.4.0 (beta), 04 April 2023