hww: make DeviceMgr.select_device dlg msg more explicit (add details)

related https://github.com/spesmilo/electrum/issues/4199#issuecomment-1145063552

electrum/gui/qt/main_window.py

@@ -2153,6 +2153,7 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
     def query_choice(self, msg, choices):
         # Needed by QtHandler for hardware wallets
         dialog = WindowModalDialog(self.top_level_window(), title='Question')
+        dialog.setMinimumWidth(400)
         clayout = ChoicesLayout(msg, choices)
         vbox = QVBoxLayout(dialog)
         vbox.addLayout(clayout.layout())

electrum/keystore.py

@@ -797,7 +797,7 @@ class Hardware_KeyStore(Xpub, KeyStore):
         # handler.  The handler is per-window and preserved across
         # device reconnects
         self.xpub = d.get('xpub')
-        self.label = d.get('label')
+        self.label = d.get('label')  # type: Optional[str]
         self.soft_device_id = d.get('soft_device_id')  # type: Optional[str]
         self.handler = None  # type: Optional[HardwareHandlerBase]
         run_hook('init_keystore', self)

electrum/plugin.py

@@ -671,12 +671,12 @@ class DeviceMgr(ThreadJob):
         if not allow_user_interaction:
             raise CannotAutoSelectDevice()
         # ask user to select device manually
-        msg = ""
-        if keystore.label and keystore.label not in PLACEHOLDER_HW_CLIENT_LABELS:
-            msg += _(
-                """Could not automatically pair with device """
-                """for keystore labelled "{}".\n""").format(keystore.label)
+        msg = (
+                _("Could not automatically pair with device for given keystore.") + "\n"
+                + f"(keystore label: {keystore.label!r}, "
+                + f"bip32 root fingerprint: {keystore.get_root_fingerprint()!r})\n\n")
         msg += _("Please select which {} device to use:").format(plugin.device)
+        msg += "\n(" + _("Or click cancel to skip this keystore instead.") + ")"
         descriptions = ["{label} ({maybe_model}{init}, {transport})"
                         .format(label=info.label or _("An unnamed {}").format(info.plugin_name),
                                 init=(_("initialized") if info.initialized else _("wiped")),