TIM-420: Format default prompts with long lines

* Format the default prompts and options with long lines so that they
  don't look like they have weird wrapping in narrow edit displays.
* Remove some unused UI mockups
* Silence a small number of nitpicky pylint warnings
Merge pull request #257 from edx/jrbl/420-triage-tiny-screens

TIM-420: Format default prompts with long lines