Add reminder for Tk upgrade,
@@ -2131,6 +2131,7 @@ def _check_dialog_parent(options):
if running_on_mac_os():
# used to require master/parent (https://bugs.python.org/issue34927)
# but this is deprecated in Catalina (https://github.com/thonny/thonny/issues/840)
+ # TODO: Consider removing this when upgrading from Tk 8.6.8
del options["master"]
del options["parent"]
