[#369] add scroller

app/assets/javascripts/extra/scroller.js.coffee

@@ -0,0 +1,13 @@
+# http://sitear.ru/material/sozdaem-knopku-naverh-scroll-to-top-na-jquery
+$(window).scroll ->
+  if $(this).scrollTop() > 0
+    $("#scroller").fadeIn()
+  else
+    $("#scroller").fadeOut()
+  return
+
+$("#scroller").click ->
+  $("body,html").animate
+    scrollTop: 0
+  , 400
+  false

app/assets/javascripts/new_application.js

@@ -41,6 +41,7 @@
 //= require extra/highlight
 
 //= require extra/pull
+//= require extra/scroller
 
 //= require_self
 

app/assets/stylesheets/custom_bootstrap.css.sass

@@ -218,3 +218,10 @@ textarea.resize-vertical
 
 .update-label, .update-status, .pointer
   cursor: pointer
+
+#scroller
+  position: fixed
+  bottom:   30px
+  left:     20px
+  cursor:   pointer
+  display:  none

app/views/layouts/_scroller.html.slim

@@ -0,0 +1 @@
+#scroller.fa.fa-arrow-circle-up.fa-2x.text-primary

app/views/layouts/application.html.slim

@@ -33,3 +33,5 @@ html
       == javascript_include_tag 'moment/ru.js', cache: 'moment'
       == javascript_include_tag 'angular-locale_ru-ru', cache: 'angular-locale'
     == yield :additional_scripts if content_for?(:additional_scripts)
+
+    == render '/layouts/scroller'