Press esc twice to reset to root page in single doc mode

assets/javascripts/templates/pages/help_tmpl.coffee

@@ -88,7 +88,7 @@ app.templates.helpPage = """
     <dd class="_shortcuts-dd">Search on Google
     <dt class="_shortcuts-dt">
       <code class="_shortcut-code">escape</code>
-    <dd class="_shortcuts-dd">Reset
+    <dd class="_shortcuts-dd">Reset<br>(press twice in single doc mode)
     <dt class="_shortcuts-dt">
       <code class="_shortcut-code">?</code>
     <dd class="_shortcuts-dd">Show this page

assets/javascripts/views/layout/document.coffee

@@ -24,7 +24,12 @@ class app.views.Document extends app.View
     app.router.show '/help#shortcuts'
 
   onEscape: ->
-    app.router.show if app.isSingleDoc() then app.doc.fullPath() else '/'
+    path = if !app.isSingleDoc() or location.pathname is app.doc.fullPath()
+      '/'
+    else
+      app.doc.fullPath()
+
+    app.router.show(path)
 
   onBack: ->
     history.back()