Show doc index on escape in single doc mode instead of reloading the page

assets/javascripts/views/layout/document.coffee

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