CMS Request: Removing the 'All' Filter Option in Dropdown and Radio Button Input Elements

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Currently, when using the dropdown or radio button input elements to let visitors filter content, it is not possible to remove the "All" filter option. When visitors select "All" in these filters, every item that is retrieved from the dataset is displayed. 
Screenshot of the 'All' filter option in a dropdown input element.
We are always working to update and improve our products, and your feedback is greatly appreciated.