partial commit to fix wallet utils

this commit provide a lot of changes in will-settings including export to ics calendar file.

wallet_util/bal_wallet_utils_qt.py

@@ -1,30 +1,31 @@
 #!/usr/bin/env python3
-import sys
-import os
 import json
+import os
+import sys
+
+from bal_wallet_utils import fix_will_settings_tx_fees, save, uninstall_bal
+from electrum.storage import WalletStorage
 from PyQt6.QtWidgets import (
     QApplication,
-    QMainWindow,
-    QVBoxLayout,
+    QFileDialog,
+    QGroupBox,
     QHBoxLayout,
     QLabel,
     QLineEdit,
+    QMainWindow,
     QPushButton,
-    QWidget,
-    QFileDialog,
-    QGroupBox,
     QTextEdit,
+    QVBoxLayout,
+    QWidget,
 )
-from electrum.storage import WalletStorage
-from bal_wallet_utils import fix_will_settings_tx_fees, uninstall_bal, save
 
 
 class WalletUtilityGUI(QMainWindow):
     def __init__(self):
         super().__init__()
-        self.initUI()
+        self.init_ui()
 
-    def initUI(self):
+    def init_ui(self):
         self.setWindowTitle("BAL Wallet Utility")
         self.setFixedSize(500, 400)