I think there is little benefit in shortening the string names.
Sure, it makes the code shorter, but also harder to understand.
For example deck_conf_ren and deck_conf_res are sort of hard to figure out without reading the actual strings.
How about:
  deck_conf_add
  deck_conf_rename
  deck_conf_restore
and related strings to match, like:
  deck_conf_rename_title
  deck_conf_rename_question
  deck_conf_rename_summary