LMB and context menu

[Podonok]

In A2 I could use LMB to select items in context menu. In A3 pressing LMB with menu open will first result in firing a gun, and then executing context option (if I set LMB to execute). I want an A2 behavior of LMB - so, overriding "fire" if context menu is open. Using MMB is not an option as it is set to switching freelook.

[Thom]

Buy a mouse with more bottuns?