Fix context menus to not run cell commands twice

[rchiodo]

For #4532

• Pull request represents a single change (i.e. not fixing disparate/unrelated things in a single PR)
• Title summarizes what is changing
• Has a news entry file (remember to thank yourself!)
• Has sufficient logging.
• Has telemetry for enhancements.
• Unit tests & system/integration tests are added/updated
• Test plan is updated as appropriate
• package-lock.json has been regenerated by running npm install (if dependencies have changed)

[codecov]

Codecov Report

Merging #4544 into master will increase coverage by 20%.
The diff coverage is 80%.

@@           Coverage Diff            @@
##           master   #4544     +/-   ##
========================================
+ Coverage      58%     78%    +20%     
========================================
  Files         367     443     +76     
  Lines       15789   20879   +5090     
  Branches     2462    3372    +910     
========================================
+ Hits         9129   16165   +7036     
+ Misses       6047    4707   -1340     
+ Partials      613       7    -606

Flag	Coverage Δ
#Linux	66% <20%> (?)
#Windows	66% <20%> (?)
#macOS	65% <20%> (?)