tx window: do not always set prompt_if_unsaved

gui/qt/main_window.py

@@ -2239,7 +2239,7 @@ class ElectrumWindow(QMainWindow):
         tx = self.tx_from_text(data)
         if not tx:
             return
-        self.show_transaction(tx)
+        self.show_transaction(tx, prompt_if_unsaved=True)
 
 
     def read_tx_from_file(self):
@@ -2261,7 +2261,7 @@ class ElectrumWindow(QMainWindow):
             return
         tx = self.tx_from_text(text)
         if tx:
-            self.show_transaction(tx)
+            self.show_transaction(tx, prompt_if_unsaved=True)
 
     def do_process_from_file(self):
         tx = self.read_tx_from_file()

gui/qt/transaction_dialog.py

@@ -143,7 +143,7 @@ class TxDialog(QDialog):
     def sign(self):
         def sign_done(success):
             self.sign_button.setDisabled(False)
-            self.prompt_if_unsaved = True
+            self.prompt_if_unsaved = False
             self.saved = False
             self.update()
         self.sign_button.setDisabled(True)