Added the spin specific residue name and spin_id to the title of the dispersion plots.
This is handy, since it is often of interest to have this information at hand, when looking through many graphs.
sr #3124(https://gna.org/support/?3124): Grace graphs production for R1rho analysis with R2_eff as function of Omega_eff.
sr #3138(https://gna.org/support/?3138): Interpolating theta through spin-lock offset [Omega], rather than spin-lock field strength [w1].
