Ikhal doesn't save changes in start or end times if you exit the widget with Page Down

[Pi2048]

Describe the bug If I open an event for editing in ikhal, and I change the start or end time, this change is sometimes not saved. This occurs if I exit the widget for the start or end time by using Page Down instead of the arrow keys.

If applicable: Stack Trace n/a

To Reproduce Steps to reproduce the behavior:

These are the steps for the From: time, but the bug also applies to the To: time.

• Start ikhal
• Move the cursor to an existing event with a start and end time (i.e. not an all-day event) and press enter to view details.
• Press enter again to open the event editor
• Use the arrow keys to navigate to the From: time field.
• Change its value slightly, e.g. change 18:10 to 18:12
• Navigate away from the field, but use Page Down instead of the arrow keys. The cursor ends up on the Export button.
• Press the up arrow key once to land on the Save button.
• Press enter to press the Save button.

Expected behavior I expected the change I made to the From: time to be saved and displayed in the calendar overview. Instead, the change I made is silently dropped.

Screenshots If applicable, add screenshots to help explain your problem.

OS, version, khal version and how you installed it:

• The output of khal --version: khal, version 0.11.3
• Installation method: PyPi
• python version: Python 3.10
• OS: Ubuntu 22.04
• Your khal config file: I use a minimal config file with two calendars. The only fields that are relevant to this bug are:

  
  [locale]

timeformat="%H:%M"

 - The versions of your other python packages [e.g. the output of `pip freeze`]
n/a

**Additional context**
Add any other context about the problem here. Especially, if the issue came up when reading an .ics file, please provide the content of that file (anonymize if needed).

[Pi2048]

This is possibly a duplicate of #1274

[geier]

should be fixed with #1346