feat: specify time zone by name without time zone data

[langbein-daniel]

Proposed Changes

In the configuration file, use the new variable timezone instead of the old timezoneData variable.

Reason:

According to the Moment.js documentation, the Node.js variant includes all timezone data. So there is no need to manually set the timezone data. It is enough to just specify the timezone name, e.g. Europe/Helsinki.

Benefits:

• This saves us the effort of updating the time zone data every few years.
• It simplifies the code a bit.
• It is easier to adjust the configuration for a different timezone. E.g. timezoneData: 'Europe/Berlin' instead of

timezoneData: 'Europe/Berlin|LMT CET CEST CEMT|-R.s -10 -20 -30|012121212121212321212321212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121212121|-36RcR.s 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Notes:

I tested this locally to be working with the Helsinki and Berlin time zones. But I haven't added any new test cases.

I am looking forward to your feedback regarding the proposed changes!

Pull Request Check List

• A reasonable set of unit tests is included
• Console does not show new warnings/errors
• Changes are documented or they are self explanatory
• This pull request does not have any merge conflicts
• All existing tests pass in CI build
• Code coverage does not decrease (unless measured incorrectly)

Review

• Read and verify the code changes
• Test the functionality by running the UI locally with all popular browsers available in your platform
• Check that the implementation matches the design, when such one is defined in a Jira issue
• Merge the pull request

[optionsome]

The reason why the timezoneData is specified this way is because including all timezones (and historical data) is quite heavy (almost 1mb). Defining the timezoneData is quite annoying as you have to know where to define them. However, I still think it's worth the effort to not include unnecessary timezone data in the code. So if these changes mean that the extra timezone data will be sent to users, I'm a bit unwilling to accept this pr.