Fix offline flag description

[alexanderbez]

replaces: #5056
closes: #5053
credit: @wangkui0508

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• Targeted PR against correct branch (see CONTRIBUTING.md)

• Linked to github-issue with discussion and accepted design OR link to spec that describes this work.

• Wrote tests

• Updated relevant documentation (docs/)

• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md

• Re-reviewed Files changed in the github PR explorer

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For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[codecov]

Codecov Report

Merging #5114 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5114      +/-   ##
==========================================
- Coverage   54.86%   54.85%   -0.02%     
==========================================
  Files         295      295              
  Lines       18261    18261              
==========================================
- Hits        10019    10017       -2     
- Misses       7493     7495       +2     
  Partials      749      749