Renames step with duplicate name/id than in Ruby.

Prevents a bug in which a user clicks on "Iterate over collections." in Ruby in
Upcase, and it changes the state also in Javascript.

This bug arises because we hash the title, they shouldn't be repeated.

Trello card:
https://trello.com/c/unIosFJ7/152-bug-some-trail-checkboxes-seem-linked