Add dashboard kiosk mode

[dominikriemer]

Body

Introduce a new kiosk mode for the dashboard:

• Users should be able to mark a dashboard as public
• A new kiosk mode view should display the dashboard in full-screen mode, without StreamPipes toolbar and iconbar

StreamPipes Committer

I acknowledge that I am a maintainer/committer of the Apache StreamPipes project.

[dominikriemer]

Also see #1838

[kruscho]

Sounds awesome 😍