New time/date input widgets, etc. (#19)

* Dropped support for old non-ES6-supporting browsers.
* Larger input clock with both ISO-8601 and localized date/time formats.
* Larger dropdown calendar for date selection, with moon phases.
* Optional large floating clock for easier date/time entry on mobile devices.
* Optional seconds precision for clock, most useful for close examination of eclipse timing.
* Choice of degrees/minutes or decimal degrees for latitude/longitude input.
* Improved usability on mobile devices. (Alas, this is still a more desktop-oriented app.)
* More information provided in Time view.
* Use locale-based first day of week for calendars.

Author: kshetline

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "svc-ng",
-  "version": "1.14.1",
+  "version": "1.14.3",
   "license": "MIT AND GPL-3.0-or-later",
   "author": "Kerry Shetline <kerry@shetline.com>",
   "scripts": {