Query Editor New Connection To Drop Down List Show Only Required Option

Implement a backend option for connection to in the query editor, show only what we set in the backend.
Currently we have drop down list is like below.
1. Listener
2. Server
3. Service

Instead of this we want to list only Server and hid the Listener and Service from the drop down list.

in the maxscale.cnf, can you add some parameter related to SQL editor, so that we can configure what we can show in the drop down list.

ex1: sql_connect_to=Server
ex2: sql_connect_to=Server,Service
ex3: sql_connect_to=Server,Service, Listner

Which connection they want they can configure like above. So that every time we dont need to select from the drop down list.