We provide an option to change the position of the toolbar in all the layouts but NOT for the Next/previous button on the Wizard layout. If you want, you may choose the other layouts like tabs on the left/top to remove the next/previous button.
@r_fabi yes, you can. but change the approach here. Create a normal button anywhere and put the script to navigate to the next panel or previous. The toolbar can be customized as well to move it left or right.