Draft: No longer collapse lists when version history is multi-line

Necessary changes to implement gitlab#339265 (closed) and some minor code improvements.

Removes collapsable list behavior from multi-line version history.

This section and below has a good variety of different permutations of version history: http://eread-remove-collapsing-from-version-history-lists.178.62.207.141.nip.io/ee/user/admin_area/settings/account_and_limit_settings.html#customize-session-duration-for-git-operations-when-2fa-is-enabled

Overwrites technical-writing#477 (closed)