fix(extensions): adding Context Menu custom commands was not working

[ghiscoding]

• seems like it was working only when "enableTranslate" was active, it should now work in both cases with/without translations

[codecov]

Codecov Report

Merging #548 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #548   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          148       148           
  Lines         9716      9717    +1     
  Branches      3412      3413    +1     
=========================================
+ Hits          9716      9717    +1     

Impacted Files	Coverage Δ
...gular-slickgrid/extensions/contextMenuExtension.ts	100.00% <100.00%> (ø)

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