Bug #32126 Zooming out too far or maximizing window makes the model disappear

Description:
When I have a large model loaded in, and then zoom out by dragging the resizer in the navigator to zoom out, eventually my model will just dissappear.  This occured when I was trying to fit my entire model onto the screen.

It also can be triggered by resizing the window to make it larger.

It seems to be related to when the model would entirely fit on the screen.

I will upload screenshots.

How to repeat:
Load in the attached model.
Move the zoom slider to the left until everything dissappears.  It seems to occur around 63 for me.

Suggested fix:
Don't make stuff dissappear.

this still happens on version 5.0.11a OSS

This is still occurring in version 5.0.12 OSS Beta Revision 2434

Still broken in 5.0.13 beta

Also I would add that the frame buffer outside of the "canvas" is not being properly updated as well.  So panning around while zoomed out leaves the classic solitaire ghost paths.

This seems fixed in software rendering since 5.0.14, but panning when zoomed out (which doesn't make much sense though) behaves weird.
With hardware randering it still doesn't work.

closing this because problem is fixed with software rendering and HW rendering won't be available in WB 5.0.