Last layout fix for FF'

[DanSallau]

Last tweak up my sleeve with regard to FF issue. Firefox has some little issue with flex as noted here http://stackoverflow.com/questions/34982834/rendering-problems-using-flexbox-in-firefox-and-chrome-48 and http://stackoverflow.com/questions/26895349/how-can-i-get-ff-33-x-flexbox-behavior-in-ff-34-x . You may come across similar issue that can be resolved by simply setting the default or initial width an height. 😉

[coveralls]

Coverage remained the same at 30.968% when pulling 59ce7c1 on nuruddeensalihu:nuru_last_fix into b45392f on binary-com:master.