Category picker for muting?

Our site contains a fair number of categories. Most of the users are only interested in a few of these. As the user preferences currently work the categories are all individual entries, so setting up the “mute list” is a bother.

Would it be possible to change the way this works so that the user could pull down a display of all topics, similar to the way the hamburger shows all categories, but display that list with a checkbox beside each category?

This would make the user experience, especially for users who use mailing list mode, a lot more convenient to configure.