Add a default timezone that the administrator can set in the settings.
This setting is be used as default for the users timezone preference.
Can be used when creating Grafana instances without administrator
intervention, in order to give user the correct default timezone.
Fixes#25654
* Add support for local time formats in graph panel
* Enfore 24h format for backward compatibility
* Use existing Intl.DateTimeFormatOptions
* Pre-generate time scale, add tests
* Move localTimeFormat, add local format to units
* updated default fallback
* #25602, use navigator.languages to enforce locale in formatting
* Making options
* Worked new system settings
* things are working
* Local browser time formats working
* Support parsing dates in different formats
* settings updated
* Settings starting to work
* Fixed graph issue
* Logs fix
* refactored settings a bit
* Updated and name change
* Progress
* Changed config names
* Updated
* Updated
* Updated test
* Synced description
* fixed ts issue
* Added version notice
* Ts fix
* Updated heatmap and test
* Updated snapshot
* Updated
* fixed ts issue
* Fixes
Co-authored-by: Alex Shpak <alex-shpak@users.noreply.github.com>
