qml: fix refresh bug in history, for local->unconfirmed tx transition

Previously if a local tx got broadcast, it was still displayed as local
in the history until it got mined (or some other action forced a full refresh).

electrum/address_synchronizer.py

@@ -439,6 +439,10 @@ class AddressSynchronizer(Logger, EventListener):
             if tx is None:
                 continue
             self.add_transaction(tx, allow_unrelated=True, is_new=False)
+            # if we already had this tx, see if its height changed (e.g. local->unconfirmed)
+            old_height = old_hist.get(tx_hash, None)
+            if old_height is not None and old_height != tx_height:
+                util.trigger_callback('adb_tx_height_changed', self, tx_hash, old_height, tx_height)
 
         # Store fees
         for tx_hash, fee_sat in tx_fees.items():

electrum/gui/qml/qewallet.py

@@ -181,9 +181,15 @@ class QEWallet(AuthMixin, QObject, QtEventListener):
             self._logger.info(f'new transaction {tx.txid()}')
             self.add_tx_notification(tx)
             self.addressModel.setDirty()
-            self.historyModel.setDirty() # assuming wallet.is_up_to_date triggers after
+            self.historyModel.setDirty()  # assuming wallet.is_up_to_date triggers after
             self.balanceChanged.emit()
 
+    @qt_event_listener
+    def on_event_adb_tx_height_changed(self, adb, txid, old_height, new_height):
+        if adb == self.wallet.adb:
+            self._logger.info(f'tx_height_changed {txid}. {old_height} -> {new_height}')
+            self.historyModel.setDirty()  # assuming wallet.is_up_to_date triggers after
+
     @qt_event_listener
     def on_event_removed_transaction(self, wallet, tx):
         if wallet == self.wallet: