There isn't a checkbox for it, but you can do it by going to MoI's main installation folder, and inside the \ui subfolder under that, delete (or probably better, just rename to some other name) the ViewControls.htm file.

If MoI can't find that file named ViewControls.htm, that toolbar at the bottom of the viewport won't appear.

But this will also mean you won't have access to the "Reset" command on there which is pretty useful... It is possible to set that up on a keyboard shortcut though, let me know if you need help with that.

- Michael