Move install wizard invocations to one place

Fixes bugs whereby install wizard invoked from the GUI was missing
various things, such as updating recently used list, setting up
timers, etc.

gui/qt/__init__.py

@@ -150,35 +150,28 @@ class ElectrumGui(MessageBoxMixin):
                 self.show_warning(str(e))
                 return
             action = wallet.get_action()
-        # run wizard
+
         if action is not None:
+            return self.install_wizard(storage, action)
+
+        wallet.start_threads(self.network)
+        return self.create_window_for_wallet(wallet)
+
+    def install_wizard(self, storage, action):
         wizard = InstallWizard(self.app, self.config, self.network, storage)
         wallet = wizard.run(action)
-            # keep current wallet
-            if not wallet:
-                return
-        else:
-            wallet.start_threads(self.network)
-
-        return wallet
+        return self.create_window_for_wallet(wallet)
 
     def new_window(self, path, uri=None):
         # Use a signal as can be called from daemon thread
         self.app.emit(SIGNAL('new_window'), path, uri)
 
-    def start_new_window(self, path, uri):
-        for w in self.windows:
-            if w.wallet.storage.path == path:
-                w.bring_to_top()
-                break
-        else:
-            wallet = self.load_wallet_file(path)
+    def create_window_for_wallet(self, wallet):
         if not wallet:
             return
         w = ElectrumWindow(self, wallet)
         w.connect_slots(self.timer)
-            # add to recently visited
-            w.update_recently_visited(path)
+        w.update_recently_visited(wallet.storage.path)
         # initial configuration
         if self.config.get('hide_gui') is True and self.tray.isVisible():
             w.hide()
@@ -187,8 +180,17 @@ class ElectrumGui(MessageBoxMixin):
         self.windows.append(w)
         self.build_tray_menu()
         run_hook('on_new_window', w)
+        return w
 
-        if uri:
+    def start_new_window(self, path, uri):
+        for w in self.windows:
+            if w.wallet.storage.path == path:
+                w.bring_to_top()
+                break
+        else:
+            w = self.load_wallet_file(path)
+
+        if uri and w:
             w.pay_to_URI(uri)
 
         return w

gui/qt/main_window.py

@@ -50,7 +50,6 @@ from network_dialog import NetworkDialog
 from qrcodewidget import QRCodeWidget, QRDialog
 from qrtextedit import ShowQRTextEdit
 from transaction_dialog import show_transaction
-from installwizard import InstallWizard
 
 
 
@@ -385,10 +384,7 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, PrintError):
         if storage.file_exists:
             self.show_critical(_("File exists"))
             return
-        wizard = InstallWizard(self.app, self.config, self.network, storage)
-        wallet = wizard.run('new')
-        if wallet:
-            self.new_window(full_path)
+        self.gui_object.install_wizard(storage, 'new')
 
     def init_menubar(self):
         menubar = QMenuBar()