Progress bar improvements

[thom-g]

Please improve the progress bar in Inventor as follows:

1. the progress bar shall by default show the "real" progress, not a marquee (as today)
2. only one progress bar shall be used if possible; the progress of separate progress bars (e.g. when ray tracing or rendering) shall be shown in the master progress bar too
3. a task bar item info shall be used to visualize the progress in the windows taskbar. example: >link< 
   1. the task bar item info can also be used to visualize errors in the windows taskbar; e.g. turn to red if the Design Doctor windows appears
4. API: the progress value property shall be accessable (e.g. allow "progressbar.Value = 23;" instead of calling 23 times "progressbar.UpdateProgress();")

[larry.daubenspeck]

I would also like there to be .Hide and .Show methods.  Sometimes I zoom in to a component and ask for input from the user.  But they can't see it because the progress bar is in the way.  Let me hide it temporarily, and then show it when I get the input.