#26 Reorganize tool access

[Darin Gillis]

It seems that by adding the 3D Plotting tools & 2D
Plotting tools menus we have gone against the
convention already in place to use TabbedPanes to
specify the dimension of the system we are working
with. For instance, the ODE Integrator has a
first-order ODE tab and a second-order ODE tab. It
seems logical that we should use a third-order ODE tab
instead of a file menu option.

The barrier here is that much will need to be done to
reorganize the currenty 2D/3D plot panel (& tabbed
panel) system. Currently there are separate 2d & 3d
objects floating around; and we will need to put these
under the same umbrella in order to be able to mix 2D
Panels and 3D Panels in the same tool.