fix(segmentation): Set the representation visible when setting segment visible

[jbocce]

Context

After setting all segments of a segmentation to be not visible, individual segments cannot have their visibility toggled.

This can be seen in the Spline Segmentation ROI Tool example as demonstrated in the video below.

ScreenHunter.Dec.18.09.55.mp4

Changes & Results

The problem exists because when a segmentation in its entirety is made not visible, the segmentation's visible flag is set to false. Thus when an individual segment is toggled visible, its segmentation visible flag should also get flipped.

Here is the result...

ScreenHunter.Dec.18.10.11.mp4

Testing

1. Run the Spline Segmentation ROI Tool example.
2. Add a spline to segment 1 and a spline to segment 2.
3. Toggle all the segments to be not visible.
4. Toggle one of the individual segments visible.

Checklist

PR

• My Pull Request title is descriptive, accurate and follows the
  semantic-release format and guidelines.

Code

• My code has been well-documented (function documentation, inline comments,
  etc.)

Public Documentation Updates

• The documentation page has been updated as necessary for any public API
  additions or removals.

Tested Environment

System:
OS: Windows 11 10.0.26200
CPU: (20) x64 12th Gen Intel(R) Core(TM) i7-12700H
Memory: 8.54 GB / 31.68 GB
Binaries:
Node: 23.9.0 - C:\Users\joebo\AppData\Local\fnm_multishells\34284_1766069731735\node.EXE
Yarn: 1.22.22 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
npm: 10.9.2 - C:\Users\joebo\AppData\Local\fnm_multishells\34284_1766069731735\npm.CMD
bun: 1.2.23 - C:\Users\joebo.bun\bin\bun.EXE
Browsers:
Chrome: 143.0.7499.110