Yesterday I had to add some media sources. I had to scroll down the list and check mark core updates testing. My eyes were tired and it was frustrating to find them. A simple filter at the top where you could put in "backports" and have it list all sources for "back ports", or enabled & disabled, would be very handy. It could even scan the titles and use a drop down menu with key words for the titles.
This is for the truly lazy, or in my case forgetful. The drop down list I mean. It seems it would be a simple and welcome addition.