fix qt invoices list: handle lightning disabled

closes #5738

electrum/gui/qt/invoice_list.py

@@ -85,9 +85,10 @@ class InvoiceList(MyTreeView):
             return
         status_item = model.item(row, self.Columns.STATUS)
         status, status_str = get_request_status(req)
-        log = self.parent.wallet.lnworker.logs.get(key)
-        if log and status == PR_INFLIGHT:
-            status_str += '... (%d)'%len(log)
+        if self.parent.wallet.lnworker:
+            log = self.parent.wallet.lnworker.logs.get(key)
+            if log and status == PR_INFLIGHT:
+                status_str += '... (%d)'%len(log)
         status_item.setText(status_str)
         status_item.setIcon(read_QIcon(pr_icons.get(status)))
 
@@ -155,9 +156,10 @@ class InvoiceList(MyTreeView):
         menu.addAction(_("Details"), lambda: self.parent.show_invoice(key))
         if invoice['status'] == PR_UNPAID:
             menu.addAction(_("Pay"), lambda: self.parent.do_pay_invoice(invoice))
-        log = self.parent.wallet.lnworker.logs.get(key)
-        if log:
-            menu.addAction(_("View log"), lambda: self.show_log(key, log))
+        if self.parent.wallet.lnworker:
+            log = self.parent.wallet.lnworker.logs.get(key)
+            if log:
+                menu.addAction(_("View log"), lambda: self.show_log(key, log))
         menu.addAction(_("Delete"), lambda: self.parent.delete_invoice(key))
         menu.exec_(self.viewport().mapToGlobal(position))