Right mouse button now has 3 different functions + additional mouse side button hotkey tweak: lower extra mouse button reconfigured to the ESC key. I suggest rebinding upper extra mouse button to pause in game keybinds as well. Everything can be customised differently if you wish to change something.

Extra feature (compared to version FINAL): double click upper extra mouse button to trigger cancel action. Single click it to pause the game. You can of course customise everything to suit your own needs better if want to do so.