Allow B2B to navigate through the form with Tab

With
$('#company').blur(function(){
VAT only appears when we leave the input and therefore does not allow to navigate through the form with Tab

With
$('#company').on('input',function(){
that work
Merge pull request #633 from Seynaeve/patch-1

[*] FO : Allow B2B to navigate through the form with Tab betwwen company and VAT field