/resources/ & /views/back-office/: added confirm box system to BO
/controllers/ & /views/back-office/pages/articles/: many visual bug fixes in article edition page in BO and added article deletion route + wiring with confirm box
/resources/scss/ & /views/back-office/pages/article/: made top menu sexier for mobile display
/resources/scss/: removed useless :focus on buttons (causes button to keep color if not blurred, which sucks)
/resources/scss/ & /views/back-office/pages/article/: fixed many problems: made article type sexy, updated tags style and usability and fixed mobile problems