separate load_wallet hook for installwizard

plugins/trustedcoin.py

@@ -333,6 +333,11 @@ class Plugin(BasePlugin):
         t.setDaemon(True)
         t.start()
 
+    @hook
+    def installwizard_load_wallet(self, wallet, window):
+        self.wallet = wallet
+        self.window = window
+
     @hook
     def close_wallet(self):
         self.window.statusBar().removeWidget(self.trustedcoin_button)