* Add setting to enable 24-hour time format
* added hour24Clock to TimeProps
* Add incomplete dateFormatString setting
* Move 24-hour toggle to Appearance
* Add "Date & Time" subheading, cleanup after merge
* Add setting for date formatting
* Fix minor formatting and naming issues
* Document functions
* adress most comments
* add hint for date formatting
* add support for 24hr time to TimePicker
* prevent overflow on small displays
