Reproduce:
Go to rendering.
Open Scene settings.
Set "Focal Length" to a value like 200 mm.
Push "Fit" (Fit to screen) button at the lower area of the scene.
"Focal Length" is now set to 90 mm but still shows 200 mm.
When moving the bar a little, the model hops to 200 mm back.
The problem does not occur while having the "Scene settings" closed, pushing "Fit". But the value is still changed to 90 mm.
I don't know what would be the preferred behaviour:
1) "Fit" fits the model into the scene and leaves the "Focal length" untouched. (preferred by me)
2) "Fit" fits the model into the scene and changes the "Focal length" to 90 mm.
But the fact that a wrong value is displayed generated a lot of additional work for me.
