Is your feature request related to a problem? Please describe.
Would be really nice to have ability to set several blocks as full screen. It's a very powerful option to have on Cover and Media Text Blocks.

Tagging @mtias :)

Describe the solution you'd like
I've added this feature on EditorsKit plugin and here's the preview : https://twitter.com/phpbits/status/1143122996552335362