Issue #1167: Rectangle zoom on range bump
Issue #1167: Rectangle zoom on range bump

Refactors the logic for zooming onto specified axes into the _zoomOnRectangle
method. Now, the same logic for ensure correct zooming in the rnage bump region
applies to both zooming with setting the axes as well as zooming by drawing a
rectangle.

dab2000/vizabi,sergey-filipenko/vizabi,buchslava/vizabi,buchslava/vizabi,sergey-filipenko/vizabi,vizabi/vizabi,sergey-filipenko/vizabi,Gapminder/vizabi,Gapminder/vizabi,buchslava/vizabi,Gapminder/vizabi,vizabi/vizabi,dab2000/vizabi,dab2000/vizabi