qt user interface: send tab: change "Pay" button text to "Pay..."

Ellipsis ("...") is sometimes used in UIs to suggest there will be an
additional modal dialog before executing the action.

electrum/gui/qt/invoice_list.py

@@ -142,7 +142,7 @@ class InvoiceList(MyTreeView):
             can_batch_pay = all([i.type == PR_TYPE_ONCHAIN and wallet.get_invoice_status(i) == PR_UNPAID for i in invoices])
             menu = QMenu(self)
             if can_batch_pay:
-                menu.addAction(_("Batch pay invoices"), lambda: self.parent.pay_multiple_invoices(invoices))
+                menu.addAction(_("Batch pay invoices") + "...", lambda: self.parent.pay_multiple_invoices(invoices))
             menu.addAction(_("Delete invoices"), lambda: self.parent.delete_invoices(keys))
             menu.exec_(self.viewport().mapToGlobal(position))
             return
@@ -163,7 +163,7 @@ class InvoiceList(MyTreeView):
             menu.addAction(_("Details"), lambda: self.parent.show_onchain_invoice(invoice))
         status = wallet.get_invoice_status(invoice)
         if status == PR_UNPAID:
-            menu.addAction(_("Pay"), lambda: self.parent.do_pay_invoice(invoice))
+            menu.addAction(_("Pay") + "...", lambda: self.parent.do_pay_invoice(invoice))
         if status == PR_FAILED:
             menu.addAction(_("Retry"), lambda: self.parent.do_pay_invoice(invoice))
         if self.parent.wallet.lnworker:

electrum/gui/qt/main_window.py

@@ -1370,7 +1370,7 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
         grid.addWidget(self.max_button, 3, 3)
 
         self.save_button = EnterButton(_("Save"), self.do_save_invoice)
-        self.send_button = EnterButton(_("Pay"), self.do_pay)
+        self.send_button = EnterButton(_("Pay") + "...", self.do_pay)
         self.clear_button = EnterButton(_("Clear"), self.do_clear)
 
         buttons = QHBoxLayout()