Fix main pane not updating on Account changes

The pane only updated on Room model changes. If an account with no
joined rooms was added, it would be invisible until a client restart.

TODO.md

@@ -48,7 +48,6 @@
 
 - invisible uploaded mxc images?
 - first undecryptable message
-- Adding an account with no rooms
 - Join button 502
 - Leave box button focus
 

src/qml/event_handlers.js

@@ -36,7 +36,7 @@ function onCoroutineDone(uuid, result, error, traceback) {
 
 
 function onModelUpdated(syncId, data, serializedSyncId) {
-    if (serializedSyncId === ["Account"] || serializedSyncId[0] === "Room") {
+    if (serializedSyncId === "Account" || serializedSyncId[0] === "Room") {
         py.callCoro("get_flat_mainpane_data", [], data => {
             window.mainPaneModelSource = data
         })