fix(logic): Assign default classes by css type

[nVitius]

getCssType is the method exposed on Question to find that question's css in the default stylesheets.

See relevant reference from survey-core here: https://github.com/surveyjs/survey-library/blob/master/src/question.ts#L919

[nVitius]

@dmitrykurmanov @OlgaLarina

Can I ask you two to take a look at this PR?

[nVitius]

@dk981234 Let me know if you need anything from me to get this merged.

[dk981234]

Hello,

Please, merge master into your branch and resolve conflicts so we can restart azure pipelines.

Thanks,
Dmitry
SurveyJS Team