Refactorings, todos, Elm 0.19.1 upgrade

Note to reviewer: this makes the most sense commit-by-commit.

Todo:

• fix bug where "Choose" button causes app to freeze, introduced in commit 33df0754a19f115a09c22e99f0f7c23b172dc180 by State.elm code that supplies a Msg to the randomhelper that generates a server name
• clean up the start of code smell around randomhelper that updates the createServerRequest with random password