[BUTTON] : cancel button

[julkwel]

Description
We need a cancel button if user want to cancel his action.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'list'
2. Click on 'edit'
3. See there are no cancel action button

Expected behavior
For user experience (UX) , if user canceled his action , we need a cancel button to handle this action.

Additional context

• Create new button "Annuler" with btn-warning class

• Make the button action work.

[julkwel]

Fixed