cli support for hw encrypted wallets

plugins/digitalbitbox/cmdline.py

@@ -9,3 +9,6 @@ class Plugin(DigitalBitboxPlugin):
         if not isinstance(keystore, self.keystore_class):
             return
         keystore.handler = self.handler
+
+    def create_handler(self, window):
+        return self.handler

plugins/digitalbitbox/digitalbitbox.py

@@ -661,7 +661,8 @@ class DigitalBitboxPlugin(HW_PluginBase):
 
     def create_client(self, device, handler):
         if device.interface_number == 0 or device.usage_page == 0xffff:
-            self.handler = handler
+            if handler:
+                self.handler = handler
             client = self.get_dbb_device(device)
             if client is not None:
                 client = DigitalBitbox_Client(self, client)

plugins/keepkey/cmdline.py

@@ -9,3 +9,6 @@ class Plugin(KeepKeyPlugin):
         if not isinstance(keystore, self.keystore_class):
             return
         keystore.handler = self.handler
+
+    def create_handler(self, window):
+        return self.handler

plugins/ledger/cmdline.py

@@ -9,3 +9,6 @@ class Plugin(LedgerPlugin):
         if not isinstance(keystore, self.keystore_class):
             return
         keystore.handler = self.handler
+
+    def create_handler(self, window):
+        return self.handler

plugins/ledger/ledger.py

@@ -516,7 +516,8 @@ class LedgerPlugin(HW_PluginBase):
         return HIDDongleHIDAPI(dev, ledger, BTCHIP_DEBUG)
 
     def create_client(self, device, handler):
-        self.handler = handler
+        if handler:
+            self.handler = handler
 
         client = self.get_btchip_device(device)
         if client is not None:

plugins/trezor/cmdline.py

@@ -9,3 +9,6 @@ class Plugin(TrezorPlugin):
         if not isinstance(keystore, self.keystore_class):
             return
         keystore.handler = self.handler
+
+    def create_handler(self, window):
+        return self.handler