Add highlight onCardHover
more user visual callback (need improvement)
Finalize right behaviour & factorize attempt
Add "user control" for deletion
Improve understanding on right deletion

Hide other mathing right when user hover the basket of a song so that he
understands he will remove only this right.
encapsulate style edition in SimpleCard

Will be easier to change the way a selection should be displayed.
Merge branch 'ui'