Add setting to enable/disable tooltip hover during Screencast Mode.

[marcduiker]

This request is related to #15667.

I'm loving the Screencast Mode, and I use it often during presentations. The tooltip when hovering over code usually gets in the way though. I know there is a editor.hover.enabled setting to toggle the tooltip but during regular coding work I like it to be enabled. Only during screencasts I'd like it to be disabled. Could there be a setting as part of the Screencast Mode to enable/disable the hover? And possibly change other settings (e.g font-size).

[marcduiker]

A configurable ScreenCast mode would benefit a lot of streamers: https://twitter.com/mattstratton/status/1456595913716158465?t=1Er9tGIs0DKQKrW_mU-DTg