Fix bug with hung web worker

[maximusunc]

• Added upper limit to stop property of active chunk request

Motivation and context

Fixes #3080. The unzip_imgs web worker was not getting terminated when loading the last chunk in a task. I added a stopFrame limit to the chunk request so that the web worker gets properly terminated once it unzips all images.

How has this been tested?

I manually tested this by uploading 71 frames, all 2048 x 2448 to exceed the cache limit, and made sure that the web worker is correctly terminated after loading the last chunk. I also made sure that scrolling back through the previous frames worked and that frames that had been removed from the cache are successfully loaded back in.

Checklist

• I submit my changes into the develop branch
• I have added description of my changes into CHANGELOG file
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues (read github docs)
• I have increased versions of npm packages if it is necessary (cvat-canvas,
  cvat-core, cvat-data and cvat-ui)

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.
• I have updated the license header for each file (see an example below)

# Copyright (C) 2021 Intel Corporation
#
# SPDX-License-Identifier: MIT

[coveralls]

Coverage increased (+0.04%) to 74.092% when pulling d3501d0 on maximusunc:mw/fix_hung_webworker into d2e4ee4 on openvinotoolkit:develop.

[nmanovic]

@maximusunc , thanks for the contribution. Could you please add information about the fix into CHANGELOG.md?

[nmanovic]

@maximusunc , could you please update the version of cvat-core? Run npm version patch command.

[maximusunc]

Hi @nmanovic Looking at the test output, it looks like the tests timed out while running some canvas3d tests. I don't think my changes had anything to do with this test failure, but I will wait to hear back from you.

[nmanovic]

@maximusunc , thanks for the fix. For we it looks fine. All checks for the PR is OK.