No add to queue button in custom MIDI mapping.

I am currently using the full Windows 10 version of djay Pro. So far everything has been going great and i’m really loving this software! The one problem that I am having is that there is no option to map a button on my controller that can be used to add a song to the queue. So far I can manipulate every part of the software that I want from the controller and it really affects workflow when I have to switch to my mouse and keyboard just to add a song to my queue. Please include an option under the Media Library section of custom MIDI mapping to do this. Also, the Switch to Queue function does not actually switch to the queue. Thanks!