Merge branch 'am-fix-smooth-scrolling' into 'master'

Fix broken smooth scrolling

See merge request !105

app/assets/javascripts/mixins/ScrollToOnMountMixin.coffee

 @ScrollToOnMountMixin =
   componentDidMount: ->
-    $('body').animate scrollTop: @positionInPage() - @marginTop(), 700
+    $('html,body').scrollTop @positionInPage() - @marginTop()
 
   positionInPage: ->
     parseFloat @jQueryElement().offset().top

app/assets/stylesheets/_globals.sass

+html
+  scroll-behavior: smooth
+
 body
   background-color: $application-background-color
   margin: 0