Fixes to boxplot.
Fixes to boxplot.

chrisidefix/visvis,Alwnikrotikz/visvis.dev,Alwnikrotikz/visvis,pbfy0/visvis,AlanZatarain/visvis.dev,pbfy0/visvis,chrisidefix/visvis,Alwnikrotikz/visvis,chrisidefix/visvis,pbfy0/visvis.dev,almarklein/visvis.dev,chiluf/visvis.dev,Alwnikrotikz/visvis,pbfy0/visvis