Update release-2.8.0 after v2.8.0

[azhavoro]

Motivation and context

How has this been tested?

Checklist

• I submit my changes into the develop branch
• I have created a changelog fragment
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues (see 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.

[codecov]

Codecov Report

Merging #7050 (6c7ef41) into develop (3c05e84) will decrease coverage by 0.21%.
Report is 19 commits behind head on develop.
The diff coverage is 55.51%.

@@             Coverage Diff             @@
##           develop    #7050      +/-   ##
===========================================
- Coverage    82.54%   82.33%   -0.21%     
===========================================
  Files          360      361       +1     
  Lines        38977    39178     +201     
  Branches      3577     3585       +8     
===========================================
+ Hits         32172    32259      +87     
- Misses        6805     6919     +114     

Components	Coverage Δ
cvat-ui	77.29% <47.22%> (-0.22%)	⬇️
cvat-server	86.97% <63.22%> (-0.20%)	⬇️