highlight calendar URLs, add all day notices

calendar_utils/models.py

...ions/0128_alter_districtcalendarpage_calendar_and_more.py

...tions/migrations/0026_alter_electionshomepage_calendar.py

...grations/0060_alter_elections2021calendarpage_calendar.py

main/migrations/0081_alter_mainpersonpage_calendar.py

...n/migrations/0014_alter_senatcampaignhomepage_calendar.py

shared/static/styleguide2/main.css

shared/static/styleguide2/main.js

shared/static/styleguide2/pirati-ui.svg

...ations/0062_alter_uniwebcalendarpage_calendar_and_more.py

uniweb/models.py

uniweb/templates/uniweb/blocks/calendar_agenda.html

uniweb/templates/uniweb/snippet_sections.html