Thank you jatin. I try plugin. Below is my impression.
1. sidepanel() of qam-sidebar-layer.php [Is it bug?]
In this logic, even if it does not check one with admin panel, is there page in which side bar hides? ex: account etc...
2. "plugin" template type
It is convenient if you can also hide page which plugin makes.
3. Processing by URL pattern matching (Additional function request)
Template type cannot control pages strictly. If URL is used, plugin users can process more strictly. Core function hint: qa_request() / qa_request_part() / qa_get()