Increased flash timeout to 15 seconds

app/assets/javascripts/main.js.coffee

@@ -86,7 +86,7 @@ $ ->
   if (flash = $(".flash-container")).length > 0
     flash.click -> $(@).fadeOut()
     flash.show()
-    setTimeout (-> flash.fadeOut()), 3000
+    setTimeout (-> flash.fadeOut()), 15000
   # Disable form buttons while a form is submitting
   $('body').on 'ajax:complete, ajax:beforeSend, submit', 'form', (e) ->