fix calendar not sending event-info

docs/javascripts/ics_calendar.js

public/2img/index.html

public/360/index.html

public/anl/index.html

public/anmeldung-siu/index.html

public/anmeldung/index.html

public/anreise/index.html

public/ausleihe/index.html

public/barrierefreiheit/index.html

public/community/index.html

public/coworking/index.html

public/danke/index.html

public/designlabor/index.html

public/dha/index.html

public/dienstleistungen/index.html

public/digitallabor/index.html

public/dk/index.html

public/drittmittelprojekte/index.html

public/eb/index.html

public/en/2img/index.html