Fix(lengthtool) autodelete

[bionoone]

Context

in commit 20efd77#diff-4bdf7112153ce30f1829f12a4e4899bcf36b964d578c23c5c0e82235f8e166f3

there is a change in convertion from transformWorldToIndex that perform a integer index conversion in favor of imageData.worldToIndex that perform continuous index conversion.

This has an impact on annotation drawn on stack viewport, where z extend is from 0 to 1.

due to conversion, the z coordinate could become something -1e-5 leading to some side effect when preventHandleOutsideImage option is on.

Changes & Results

added a tollerance of EPSILON in new method indexAlmostWithinDimensions

Testing

add karma test exhibiting the defect

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:

[sedghi]

please revert

[bionoone]

done