draw returns height.

Refactored per rubocop.
Refactored using state.new_word

Added comments.
The clue list will always contain the current word

Each clue list is rendered off-screen amd then re-rendered if the current
clue is not displayed.
Added #new_word to State.
Merge branch 'show-current-clue'
Re-factored #next_clue and clue list drawing.