SF-3116 Disallow whitespace notes

[Nateowami]

This change is 

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 81.07%. Comparing base (d12160f) to head (03fcf1a).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...nslate/editor/note-dialog/note-dialog.component.ts	66.66%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4042   +/-   ##
=======================================
  Coverage   81.07%   81.07%           
=======================================
  Files         660      660           
  Lines       43037    43038    +1     
  Branches     7057     7057           
=======================================
+ Hits        34891    34892    +1     
  Misses       6974     6974           
  Partials     1172     1172           

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