The issue described was that the motion path didn't display the last frame
of a scene.
This PR makes the user facing motion path range inclusive on both ends.
E.g. when the user specifies a motion path from 1-24 the will now get all 24
frames, whereas previously the motion path would end at frame 23.
This also makes the `Scene Frame Range` option work properly since that
had the same issue. Now it displays the actual full scene range.
Internally, the `bMotionPath` is still exclusive on the upper bound.
It is just the `bAnimVizSettings` range that has been modified.
Pull Request: https://projects.blender.org/blender/blender/pulls/118611
Christoph Lendenfeld
a102d3e454