Category Selection on Catalog page needs improvement

Description:
Category Selection on Catalog page, Need to allow full list of options to user each time without having to clear drop down to select a different Category:


Example/Use case(s):
From the image below, when a user selects a category, a list of catalogs are being listed based on the category filter. Now to select a different category, user has to delete the entire character set before he can click on icon to load. This needs to be improved.