Select editor non-scrollable modal UX adds friction to onboarding flow

[jldec]

New users are prompted to select an editor after they sign in.

Unfortuntately this modal does not scroll and the action button is off screen for normal sized desktop browsers already taking up a the full height of the screen.

Clicking on the default editor selection does not submit or dismiss the form.

Since part of the form is obscured, a cautious user will look for the cancel/dismiss control and probably click on the X at the top right hoping that this does not have unintended consequences. This adds uncertainty into the flow and forces additional work to find the X.

[jldec]

Related to #13116
cc: @gtsiolis @loujaybee

[gtsiolis]

Closing this as a duplicate of #13497, which already contains a good MVC solution. Cc @andreafalzetti

Thanks for noticing, @jldec!

[gtsiolis]

Just noticed there's a community contributor who already picked this up in #13557.