fix(styling): extra styling shouldn't override default bootstrap style

[ghiscoding]

• also added a "lite" version since the material/salesforce theme now also include the without-bootstrap-styling and also flatpickr/multipleSelect stylings

[codecov]

Codecov Report

Merging #570 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #570   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          148       148           
  Lines         9816      9816           
  Branches      3327      3327           
=========================================
  Hits          9816      9816           

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