* enhances date navigation to allow scrolling future and past (#173, #352).
* adds supermoon, micromoon, apogee, perigee, and distance to the moon dialog (#296).
* adds 1x1 moon widgets; apogee/perigee, azimuth & elevation, right ascension & declination, and current distance.
* adds moon phases and solstice/equinox events to Suntimes Alarms ("full moon alarm"; #327).
* adds "Polar [south]" to world map projections; adds 3x3 sun position widget (Polar) (#284).
* enhances the World Map dialog to animate over time; play/pause to show changes over a span of hours or days (#284).
* enhances the World Map dialog share action; using "share" while playing saves the animation to zip.
* enhances the World Map dialog; adds "major latitudes" and "location" options.
* enhances the Blue Marble map; the shadow area now displays "Earth's City Lights" imagery.
* UI improvements; replaces "alert dialogs" with "bottom sheet" UI (#361).
* UI improvements; widget config activities, about dialog, transition animations, and floating action menu.
* fixes a bug in time zone dialog; now retains user-defined settings when toggling between modes.
* updates dependency (Time4A 4.4.2-2019c).