Update ProTip copy to be dynamic

assets/javascripts/templates/tip_tmpl.coffee

@@ -1,10 +1,10 @@
-app.templates.tipKeyNav = """
+app.templates.tipKeyNav = () -> """
   <p class="_notif-text">
     <strong>ProTip</strong>
     <span class="_notif-info">(click to dismiss)</span>
   <p class="_notif-text">
-    Hit <code class="_label">&darr;</code> <code class="_label">&uarr;</code> <code class="_label">&larr;</code> <code class="_label">&rarr;</code> to navigate the sidebar.<br>
-    Hit <code class="_label">space / shift space</code>, <code class="_label">alt &darr;/&uarr;</code> or <code class="_label">shift &darr;/&uarr;</code> to scroll the page.
+    Hit #{if app.settings.cache.arrowScroll then '<code class="_label">shift</code> +' else ''} <code class="_label">&darr;</code> <code class="_label">&uarr;</code> <code class="_label">&larr;</code> <code class="_label">&rarr;</code> to navigate the sidebar.<br>
+    Hit <code class="_label">space / shift space</code>#{if app.settings.cache.arrowScroll then ' or <code class="_label">&darr;/&uarr;</code>' else ', <code class="_label">alt &darr;/&uarr;</code> or <code class="_label">shift &darr;/&uarr;</code>'} to scroll the page.
   <p class="_notif-text">
     <a href="/help#shortcuts" class="_notif-link">See all keyboard shortcuts</a>
 """