old_contents: export const SELECT_KEY = 'SELECT_KEY'
  export const CLEAR_SELECTED_KEYS = 'CLEAR_SELECTED_KEYS'
  export const TOGGLE_COMPOSER = 'TOGGLE_COMPOSER'
  export const TOGGLE_GENERATING_KEY = 'TOGGLE_GENERATING_KEY'
  export const SHOW_COMPOSER_WITH_TYPE = 'SHOW_COMPOSER_WITH_TYPE'
  export const SET_ACTIVE_ALIAS = 'SET_ACTIVE_ALIAS'
  export const SET_OUTPUT = 'SET_OUTPUT'
  
new_contents: export const SELECT_KEY = 'SELECT_KEY'
  export const CLEAR_SELECTED_KEYS = 'CLEAR_SELECTED_KEYS'
  export const TOGGLE_COMPOSER = 'TOGGLE_COMPOSER'
  export const TOGGLE_GENERATING_KEY = 'TOGGLE_GENERATING_KEY'
  export const TOGGLE_IS_COPIED = 'TOGGLE_IS_COPIED'
  export const SHOW_COMPOSER_WITH_TYPE = 'SHOW_COMPOSER_WITH_TYPE'
  export const SET_ACTIVE_ALIAS = 'SET_ACTIVE_ALIAS'
  export const SET_OUTPUT = 'SET_OUTPUT'
  
subject: Add toggle is copied constant