Fix bug in footer to allow Safari to save dismissed state
Fix bug where footer slide-in dismissal failed in Safari private mode
Make host and port configurable thru envvars
Merge branch 'master' into lyndsysimon-hotfix/footer-safari

Conflicts:
	main.py
Set slider cookie sitewide h/t @lyndsysimon
Merge branch 'hotfix/0.21.37'