algo perf imputation is buggy and bad

[berndbischl]

for measure type = "quality" we always impute with 10 * max_val.

a) it is bad that the user cannot change this behavior / magic constant. what happens here should be exposed. or at least documented and the user told to imputed himself.

b) it does not work at all if we maximize. bug

[larskotthoff]

We also have separate functions for imputing algorithm performance for the EDA and for the conversion. This should be unified.