fix(editors): fix BS3,BS4 styles & slider value not shown with undefined

[ghiscoding]

No description provided.

[codecov]

Codecov Report

Merging #204 (3b553be) into master (b7ff862) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #204   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          206       206           
  Lines        11854     11855    +1     
  Branches      3905      3905           
=========================================
+ Hits         11854     11855    +1     

Impacted Files	Coverage Δ
packages/common/src/editors/dateEditor.ts	100.00% <100.00%> (ø)
packages/common/src/editors/sliderEditor.ts	100.00% <100.00%> (ø)

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