- clearer use ability, by switching between "back" and "cancel" buttons, according to the contexts;
- there is only one button that goes back to the previous form, but the name is changed to "cancel" or "back" according to the current mode:
 - edit mode: we perform changes and go back; changes are "cached" till we leave the edit (back button)
 - create mode: changes are immediatly committed using "apply"; if we don't want to perform the transaction, we just press "cancel" (cancel button)