qml: reconnect models on account's change

Change-Id: I7e88828308c8d64ea30e8ad15db950e0605d86dc

src/messagesadapter.cpp

@@ -40,6 +40,16 @@ MessagesAdapter::~MessagesAdapter() {}
 
 void
 MessagesAdapter::initQmlObject()
+{
+    connect(&LRCInstance::instance(),
+            &LRCInstance::currentAccountChanged,
+            this,
+            &MessagesAdapter::slotAccountChanged);
+    connectConversationModel();
+}
+
+void
+MessagesAdapter::slotAccountChanged()
 {
     connectConversationModel();
 }