Keybinding Control Option Request

Checking the box that makes left-click (MB1) bound to auto-attack-move is nice, because it's nice to have the ability to use the MB1 for that purpose. However, having shift+MB1 be the key which allows interaction with the interface is not my personal preference. I'd like to replace it with a MB3 click, in fact, there should be another field that appears when the box is checked allowing you to control what the normal MB1 function is replaced with (defaulting to Shift+MB1).

Any thoughts?