removed extra space at the left of the native editor

[DavidKutu]

For #8088

• 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!)
• Appropriate comments and documentation strings in the code
• 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)
• The wiki is updated with any design decisions/details.

[codecov-io]

Codecov Report

Merging #8288 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #8288   +/-   ##
=======================================
  Coverage   59.32%   59.32%           
=======================================
  Files         504      504           
  Lines       23087    23087           
  Branches     3736     3736           
=======================================
  Hits        13697    13697           
  Misses       8498     8498           
  Partials      892      892

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[DonJayamanne]

• Do we even need the 2px border?

• We're adding borders and not displaying the border (it's transparent)
  Seems like a hack or something we forgot to remove.
  Why not use padding/margin when that's what we want!

[DavidKutu]

It'll look the same, but ok.

[DavidKutu]

The 2 px on the top is to separate cells a bit from the top line and to separate the cells themselves.
The 2 px on the right is to separate cells from the scrollbar.

[DonJayamanne]

Do we need the 2px for top and right?