cas cell in LaTeX

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36442 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Adapt move_x_axis when xzero is outside the screen (on right)
Adapt move_y_axis when yzero is outside the screen (above)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36443 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e