Bugfix remove query string inclusion in body class generation logic

[Abhishek-17h]

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After fix body class only include the ?type= query_string in is-adding-contenttype class. All other query strings are ignored. If there's no type, no is-adding-contenttype class will be present.

Screenshots after fixing bug:

Closes #6493

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[Abhishek-17h]

Need Review @stevepiercy @Wagner3UB @sneridagh

[stevepiercy]

Thanks for the pull request! This needs review by the @plone/volto-team, but it looks good to me.

[stevepiercy]

News LGTM! Thank you for the quick response.

[Abhishek-17h]

@stevepiercy Glad to hear that! Let me know if there's anything else needed.

[davisagli]

This could still produce a weird class if the querystring has both type and some other parameters, but it's definitely an improvement.