fix(PlanarFreeHandRoiTool): FreeHand tool crashes when drawn on PT / Fusion viewport

[Celian-abd]

Context

The PlanarFreeHandRoiTool crashes when we try to annotate a PT/Fusion viewport.

Changes & Results

• Fixed the crash when we try to annotate a PT / Fusion viewport

Testing

Changes can be tested on the petCt example, I added the PlanarFreeHandRoiTool.

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

• [] "OS:
• [] "Node version:
• [] "Browser:

[Celian-abd]

@wayfarer3130 Hello, if you can take a look at this new version of the PR. I am solving the problem instead of going around.