ID 474177 - Single-frame files with version numbers become sequenced frames when versioning up/down.

Problem summary
Single-frame files with version numbers become sequenced frames when versioning up/down.

Customer reported version
nuke.13.0v1

Customer reported platform

Steps to reproduce

1) In Nuke Studio/Hiero, import a single-frame file with multiple versions.

2) Drag the clip to the timeline and view it's Properties bin for the frames.

3) Version up the clip on the timeline with alt+up and view the frames.

Expected behavior
The next version should be applied with the single frame.

Actual behavior
The single frame becomes sequenced as if the versions were a frame range, and displays a frame range for the versions.

Workaround
Ensure that the single-frame versions have a frame number available. Ex. file.v001_001.dpx, file.v002_001.dpx, etc.

Reproduced by Support in:

NukeStudio 13.0v1 - Windows 10, CentOS 7

NukeStudio 12.2v1 - Windows 10

NukeStudio 12.1v1 - Windows 10

NukeStudio 12.0v1 - Windows 10

NukeStudio 11.1v1 - Windows 10

Unable to reproduce bug in:
NukeStudio 11.0v4 - Windows 10, CentOS 7

Earliest version tested
NukeStudio 11.0v4 - This feature did not exist before this version