Option to Omit, Filter or hide closed tickets in the Customer Portal Support Tickets tab

I want to be able to filter out or hide closed/resolved tickets on the "Support Tickets" tab in the customer portal.

For clients who raise a high volume of quick Q&A requests, open/ongoing tickets can easily get pushed down the list and "off screen" by closed ones.

Having a toggle or button to "hide closed tickets" would keep active/open tickets visible.