Signal either SMT or along orientation
At the moment all the red lines are SMT (except the plot against bvecs_z).
This ticket is about allowing user to choose whether they want the SMT or the signal along a given direction.
The proposal is to add a button that is by default ticked (SMT), and if it is not, the user can move sliders for theta/phi defining the single bvec.
@ndcn0236 what do you think of this feature?