kivy: fix when running with --offline

electrum/gui/kivy/main.kv

@@ -530,6 +530,7 @@ BoxLayout:
                 ActionOvrButton:
                     name: 'network'
                     text: _('Network')
+                    disabled: app.network is None
                 ActionOvrButton:
                     name: 'addresses_dialog'
                     text: _('Addresses')

electrum/gui/kivy/main_window.py

@@ -655,7 +655,7 @@ class ElectrumWindow(App, Logger):
             util.register_callback(self.set_num_peers, ['gossip_peers'])
             util.register_callback(self.set_unknown_channels, ['unknown_channels'])
         
-        if self.electrum_config.get('auto_connect') is None:
+        if self.network and self.electrum_config.get('auto_connect') is None:
             self.popup_dialog("first_screen")
             # load_wallet_on_start will be called later, after initial network setup is completed
         else: