Fix minor error with placement of route steps

[Pilot-Marc]

Background

The pivot point for each route step is 0.5 of the distance, and there's a comment that 0.5 is sometimes off and that the constant should be a settable property. The real fix should be to set the step location to the center of the line, which would coincide with the node's default pivot point.

Note: This resolves issue #245

Breaking Changes

N/A

Meta

• Tied to Version Release(s): N/A

PR Checklist

• CI runs clean?
• Appropriate label has been added to this PR (i.e., Bug, Enhancement, etc.).
• Documentation has been added to all open, and public scoped methods and properties.
• Changelog has been updated
• Tests have have been added to all new features. (not a requirement, but helpful)
• Image/GIFs have been added for all UI related changed.

Screenshots