Revert "[Front-end] Deleted personService, added an abstract view"

This reverts commit bf6f435823bfc10d16304f62250977c97206173d.

Conflicts:
	public/app/modules/activities/activities.js
	public/app/modules/activities/components/cards/cardModule.js
	public/app/modules/activities/mainpage.tmpl.html
	public/app/modules/app.js