coin consolidation dialog: set default max block height to blockchain…

… height + 1

Set a saner default value for max block height. Fallback on 10 000 000 if the block height is not available (values of 0 or -1 can be returned by `wallet.get_local_height` in some cases).

electrumabc_gui/qt/consolidate_coins_dialog.py

@@ -122,7 +122,7 @@ def __init__(
         self.wallet: AbstractWallet = wallet
         self.transactions: Sequence[Transaction] = []
 
-        self.coins_page = CoinSelectionPage()
+        self.coins_page = CoinSelectionPage(self.wallet.get_local_height())
         self.addPage(self.coins_page)
 
         self.output_page = OutputsPage(address)
@@ -213,7 +213,7 @@ def __init__(self):
 
 
 class CoinSelectionPage(QtWidgets.QWizardPage):
-    def __init__(self, parent=None):
+    def __init__(self, blockchain_height, parent=None):
         super().__init__(parent)
         self.setTitle("Filter coins")
 
@@ -259,7 +259,9 @@ def __init__(self, parent=None):
         )
 
         self.maximum_height_sb = BlockHeightSpinBox()
-        self.maximum_height_sb.setValue(10_000_000)
+        self.maximum_height_sb.setValue(
+            blockchain_height + 1 if blockchain_height > 0 else 10_000_000
+        )
         self.maximum_height_sb.valueChanged.connect(self.on_min_or_max_height_changed)
         self.filter_by_max_height_cb = self.add_filter_by_value_line(
             "Maximum block height", self.maximum_height_sb