Blender Git Loki

Bugfix [#25617] HOME Key in fcurve editor doesn't center properly

* When euler-rotation F-Curves had a single keyframe only, the view
would be artifically extended to fill up to 57 (this comes from the
radians to degrees calculations) due to a combination of the bounds-
finding function enforcing a minimum separation of 1 unit between
min/max. This has now been moved to the operator-level where it gets
applied AFTER these conversions have taken effect

* F-Curves with samples only (i.e. baked F-Curves) would be ignored by
these operators. Was caused by using a poll calback that only
considered whether there were keyframes. Hopefully this is sufficient;
otherwise a hybrid poll method will be needed.