[#369] fix scroller

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

@@ -1,13 +1,16 @@
 # http://sitear.ru/material/sozdaem-knopku-naverh-scroll-to-top-na-jquery
-$(window).scroll ->
-  if $(this).scrollTop() > 0
-    $("#scroller").fadeIn()
-  else
-    $("#scroller").fadeOut()
-  return
+$(document).ready ->
+  $(window).scroll ->
+    if $(this).scrollTop() > 0
+      $("#scroller").fadeIn()
+    else
+      $("#scroller").fadeOut()
+    return
 
-$("#scroller").click ->
-  $("body,html").animate
-    scrollTop: 0
-  , 400
-  false
+  $("#scroller").click ->
+    $("body,html").animate
+      scrollTop: 0
+    , 400
+    false
+
+  return

app/assets/stylesheets/custom_bootstrap.css.sass

@@ -221,7 +221,7 @@ textarea.resize-vertical
 
 #scroller
   position: fixed
-  bottom:   30px
+  bottom:   20px
   left:     20px
   cursor:   pointer
   display:  none

app/views/layouts/_scroller.html.slim

@@ -1 +1 @@
-#scroller.fa.fa-arrow-circle-up.fa-2x.text-primary
+#scroller.fa.fa-arrow-circle-up.fa-2x.text-primary.hidden-xs