Domain registration / edit

[vohmar]

https://projects.invisionapp.com/share/T7HB9WYZSYV#/screens/287337995

the same design should be possible to use for new registrations and editing existing ones

[artur-intech]

@ceirok Consider using datalist (https://developer.mozilla.org/en-US/docs/Web/HTML/Element/datalist) for registrant chooser (https://prnt.sc/q8vaut) and possibly for other similar choosers.