Merge branch 'master' into '55-add-an-informative-text-above-the-introductory-video'

# Conflicts:
#   src/app/components/home/_dialogs/demo-video/demo-video.component.html
#   src/app/components/home/_dialogs/demo-video/demo-video.component.scss
#   src/app/components/home/_dialogs/demo-video/demo-video.component.ts