Insights/fix-drilldown-ux

Created by: unclejustin

Closes https://github.com/sourcegraph/sourcegraph/issues/36286

Test plan

• Open storybook
• Go to Drill Down Popover
• Sort & Limit should show a purple dot when changed
• "Default filters applied" should hide when changing any filter, including Sort & Limit
• "Save default filters" should enable when changing anything in Sort & Limit

App preview:

• Web
• Storybook

Check out the client app preview documentation to learn more.