[enhancement] model canvas movement as the canvas size is increased

[timhale7]

Expected Behaviour

When an object is click/drag'd beyond the edge of the screen, as the modeling canvas is expanded, it would be nice if the object remained in view, and the rest of the objects on the screen were moved up/left as the virtual canvas is expanded down/right.

Would be nice if this screen scroll behavior also occurred when a group is being stretched down beyond the bottom edge of the screen.

Actual Behaviour

As the modeling canvas is expanded beyond the boundaries of the physical screen, only the scrollbars indicate that the canvas size has gotten larger. To wit, when you click/drag an object beyond the boundaries of the canvas window, the scrollbars will change their relative size to indicate that there is more modeling canvas available, but it is not being shown. The currently positioned objects do not move. To use the newly positioned object, you have to drag it out of view, then grab the scroll bars to bring the new object into view.

enhancement diagram.pdf