Calculate the wanted LBI indicators
lb_ind_pretty.RdGenerate a matrix with the calculated LBI indicators so that they can be compared with thresholds. This is the modified version of 'lb_ind_ices' and does not allow to use the weight-at-length matrix needed only to calculate the 'Optimal Yield' as the maximum length that holds the largest biomass. The reason being is that there are two bugs as follows: a) the multiplication of the frequency by the weight-at-length matrices is performed in such a way that not the same year columns are picked and multiplied in the two matrices - columns are shifted - and b) multiple length classes may have the same biomass yielding a returned dimension error. Given these bugs and the fact that the affected indicator - Lmaxy/Lopt- isn't ued in the the traffic-light visualisation form -lb_table-, this indicator is no longer calculated in this version of the function.