Date and DateTime HTML inputs do not appear or behave consistently across browsers

[TW80000]

FOAM currently supports the following temporal types: Date and DateTime. Support for the HTML inputs for Dates and DateTimes is spotty across browsers. Each browser and platform provides its own implementation of a date/datetime picker, if they provide one at all. Each built-in solution looks and behaves differently. Safari doesn't have native support for such inputs at all, so the user would have to manually type in something like 2018-08-22T08:41 for a DateTime, which makes for a poor user experience compared to a GUI solution.

[kgrgreer]

Look at FOAM1 support and consider porting:

09:35:17 kgr:~/foam1$ find ./ -name "Date*" -print
.//foam/js/foam/u2/DateView.js
.//foam/js/foam/u2/md/DateField.js
.//foam/js/foam/u2/md/DatePicker.js
.//foam/js/foam/u2/md/DateTimeField.js
.//foam/js/foam/u2/search/DateFieldSearchView.js
.//foam/js/foam/ui/DateFieldView.js
.//foam/js/foam/ui/DateTimeFieldView.js
.//foam/js/foam/ui/md/DateFieldView.js
.//foam/js/foam/ui/md/DatePickerView.js
.//foam/js/foam/ui/md/DateTimeFieldView.js
.//foam/js/foam/ui/search/DateSearchView.js
.//foam/resources/svg/DateProperty.svg
.//foam/resources/svg/DateTimeProperty.svg

09:35:23 kgr:~/foam1$ find ./ -name "Calendar*" -print
.//foam/js/foam/u2/md/Calendar.js
.//foam/js/foam/ui/md/CalendarView.js