Make the SendBox work, send plaintext messages

harmonyqml/components/chat/MessageList.qml

@@ -30,7 +30,6 @@ Rectangle {
         property real yPos: visibleArea.yPosition
 
         onYPosChanged: {
-            console.log(yPos)
             if (yPos <= 0.1) {
                 Backend.loadPastEvents(chatPage.room.room_id)
             }

harmonyqml/components/chat/SendBox.qml

@@ -53,9 +53,8 @@ Rectangle {
 
                     if (textArea.text === "") { return }
 
-                    Backend.sendMessage(chatPage.user.user_id,
-                                        chatPage.room.room_id,
-                                        textArea.text)
+                    Backend.clientManager.clients[chatPage.user_id]
+                           .sendMessage(chatPage.room.room_id, textArea.text)
                     textArea.clear()
                 }
                 Keys.onEnterPressed: Keys.onReturnPressed(event)  // numpad enter