Some style cleaning in sightings page tabs
Drop placeholders from sightings_page template
Fix typo in AJAXSightingListMixin response
Draw markers in sightings page map
Add sightings filter form
Add sightings filter form JS logic, use datepicker in date fields
Refactor sightings form filter logic and send filtered request to backend service
Add filter logic per jellyfishes type in sightings page