fix(@desktop/chat): render community description in chat toolbar

This was lost during the refactor to use StatusQ components because it wasn't
clear to me that community channel descriptions should be rendered there.

Fixes #2982

ui/app/AppLayouts/Chat/ChatColumn.qml

@@ -198,6 +198,7 @@ Item {
                         //% "1 member"
                         return qsTrId("1-member");
                     case Constants.chatTypeCommunity:
+                        return chatsModel.channelView.activeChannel.description
                     default:
                         return ""
                     }