add event after navigate

Hello,

I have a bug with Firefox only... if I go to : `/some-page`, and scroll to its bottom, and then change page to `/some-other-page` , I land on the new page but not scrolled to the top.

The way I see to solve this would be to add an event after router.navigate and scroll manually to the top, but it does not seem to have an event existing for this. 

Any thought ?
Vincent
