core+gui: timezone-correct datetimes, deep-copy WillItem, dead code removal, explicit imports

bal/gui/qt/calendar.py

@@ -13,12 +13,16 @@ The pure RFC-5545 logic (offsets, escaping, folding, the unified .ics builder,
 the Qt button and the OS/subprocess glue.
 """
 
+import os
+import subprocess
+
 from PyQt6.QtGui import QAction
-from PyQt6.QtWidgets import QToolButton
+from PyQt6.QtWidgets import QInputDialog, QMenu, QToolButton
+
+from electrum.gui.qt.util import getSaveFileName
 
 from ...core.reminders import write_temp_ics
-from .common import *
-from .common import _, _logger  # underscore names are not re-exported by "import *"
+from .common import _, _logger
 
 
 class BalCalendarButton(QToolButton):