refs #6933
Some hard timezones of the hard coded list where shown (`label`-property) with a `GMT`-offset incl. DST. All offsets are now without DST.
Removes `offset` property as it is not used and `Greenwich Mean Time` from label.
closes#6406
- adding timeZone Service to get the offset (=timezone reg. moment-timezone) overall available
- new publishedAtOffset date as CP using timeZone service and moment-timezone to calculate offset incl. DST
- removing timezone-obj transform as it became obsolete with moment-timezone
- reading timezones from configuration/timezones api endpoint
- adding a moment-utc transform to only work with utc times in backend
- when switching the timezone in the select box, the user will be shown the local time of the selected timezone
- added clock service to show actual time ticking below select box
- default timezone is '(GMT) Greenwich Mean Time : Dublin, Edinburgh, London'
- if no timezone is saved in the settings yet, the default value will be used
- showing local time in 'Publish Date' when it's a draft and no actual publishedAt value exists
- Removed the format 'DD MMM YY @ HH:mm (UTC Z)' which resolves to '01 Jan 16 @ 14:00 (UTC +02:00)'
- Changing the date.js helper in core/server for moment-timezone
- Fix timezone select: updates `selectedTimezone` to return the matching object from `availableTimezones`
- Including timezones in test for date-helper
- update to moment-timezone 0.5.1
- moving form-group of 'selectTimezone' further up so
- Tests:
- Set except for clock service in test env
- adding fixtures to mirage
- adding 'service.ajax' to navigation-test.js
- adding 'service:ghostPaths' to navigation-test.js
- Code improvements
- Changing clockservice to ES6
refs #6406
- endpoint configuration/timezones refers to timezones.json file in data
- added route for endpoint in api.js to use method read in configuration.js
