Technical update

Fixed some bugs that first appeared when using iOS 17

Fixed problem with the time picker.

Added a black icon to choose from.

Fixed bug that was happening since iOS 13 where opening the month overview froze the app.

Adjusted the app for iOS 13.

Fixed bugs:
- unchecking reminders from the details screen was not always saved
- repeat option was not always saved
- list picker inside details screen showed overlapping account labels

Also fixed a few crashes in this update.