Highlight scaled and absolutely positioned facts within tables

[austinmatherne-wk]

Reason for change

Fact highlighting of absolutely positioned content doesn't apply to facts within tables. Additionally, the highlight outline width is set to a pixel size and doesn't adjust for documents that use CSS scale transforms.

Description of change

• Use em sizes to define fact highlight outlines for scaled documents.
• Highlight fact content that is absolutely positioned within tables.
• Fix AttributeError: 'IXBRLViewerBuilderError' object has no attribute 'message'
• Use a default empty string script path (for the built-in script file) in the GUI instead of an absolute path so users can have multiple versions of Arelle and ixbrl-viewer (frozen build and Python source) on the same machine.
• Explicitly exit generation early if destination is None.
• Replace nonexistent os.path.filepart method reference.
• Update Node versions used for CI tests to current active versions (maintenance, LTS, and current.)

Steps to Test

• Test internal doc.

review: @Arelle/arelle @paulwarren-wk

[aviary-wf]

Security Insights

No security relevant content was detected by automated scans.

Action Items

• Review PR for security impact; comment "security review required" if needed or unsure

• Verify aviary.yaml coverage of security relevant code

  Questions or Comments? Reach out on Slack: #support-infosec.

[derekgengenbacher-wf]

QA +10 Testing locally succeeded.