Bug 364510

When I am editing 4K footage in an HD project, when I hit this button I expect the footage to be zoomed to 200%. 
This also used to be the behavior of this icon. Right now it seems more like it fits the footage to the project's resolution

Reproducible: Always

Steps to Reproduce:
1.Load 4K footage in HD project
2.Add Position and Zoom effect to clip
3.Hit the "Zoom to original Size" icon

Actual Results:  
Footage is fitted to the project size. 

Expected Results:  
Footage should be zoomed in until each pixel in the original footage is equal to each pixel in the footage. 

There may be an opportunity to clear something up here. 
Does the zoom level refer to the amount the clip is zoomed to fit to the project, or is it the amount the project window must be zoomed in or out?

If the former, then UHD footage in HD project should show 50%, unless the zoom to original size button is hit, and in the same vein footage of a lesser resolution should show that it is scaled up. 
This is the view that makes more sense, ie: how much is the footage scaled either way?


If the latter, then when I hit zoom to original Size, the zoom indicator should show 200% for UHD footage in HD project.