feat(editor): use better error message for inclusive values

[ghiscoding]

No description provided.

[codecov]

Codecov Report

Merging #499 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #499   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          148       148           
  Lines         9548      9556    +8     
  Branches      3324      3328    +4     
=========================================
+ Hits          9548      9556    +8     

Impacted Files	Coverage Δ
src/app/modules/angular-slickgrid/constants.ts	100.00% <100.00%> (ø)
...gular-slickgrid/editorValidators/floatValidator.ts	100.00% <100.00%> (ø)
...lar-slickgrid/editorValidators/integerValidator.ts	100.00% <100.00%> (ø)

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