Combined Fluid View missing go to

Thanks for the Combined Fluid View implemented. 

When I click on the main forum (itself contains others subforums), it show all topics from their sub categories. That is fine. 

When I click on New Topic it show me al sub categories. That is fine. 

Now I just want to go a specific subforum, then I discovered there should be available a subcategories Drawer to be clicked. 

Please consider add a drawer to wrap subcategories, give user facility to click on it and Go To specific forum.