Fix mountain chart min max problem. Fixes #594
Fix mountain chart min max problem. Fixes #594

dab2000/vizabi,dab2000/vizabi,sergey-filipenko/vizabi,dab2000/vizabi,buchslava/vizabi,jdk137/vizabi,buchslava/vizabi,alliance-timur/vizabi,jdk137/vizabi,Gapminder/vizabi,alliance-timur/vizabi,vizabi/vizabi,vizabi/vizabi,jdk137/vizabi,Gapminder/vizabi,sergey-filipenko/vizabi,alliance-timur/vizabi,buchslava/vizabi,Gapminder/vizabi,sergey-filipenko/vizabi