Update UI through async calls MainFrameRepaint and AddressBookRepaint instead of a timer.

- Overall, this is better design
- This fixes problems with the address book UI not updating when the address book is changed through RPC
- Move Statusbar change detection responsibility to ClientModel

src/qt/addresstablemodel.h

@@ -56,10 +56,6 @@ public:
      */
     QString addRow(const QString &type, const QString &label, const QString &address);
 
-    /* Update address list from core. Invalidates any indices.
-     */
-    void updateList();
-
     /* Look up label for address in address book, if not found return empty string.
      */
     QString labelForAddress(const QString &address) const;
@@ -82,6 +78,8 @@ signals:
     void defaultAddressChanged(const QString &address);
 
 public slots:
+    /* Update address list from core. Invalidates any indices.
+     */
     void update();
 };