removve chapter management header from chapter preview pages; remove/rewrite some buttons to make chapter->preview draft->edit flow clearer
change sentence case button text to title case
rremove auto-backdating logic; add logic will resets publication date when backdating is off
remove leftover comment
changes after Elz's review: setflash instead of flash and ts()
change ts string to remove key and default
change chapter controller's logic for updating work's revised_at date
manual merge from issue_2089
remove unused @previous_ instance variables; coorrect flash message on updating work
doing a chained save inside a before_save callback was a terrible idea, move desired logic to controller instead