Topic list tabs for user-customizeable saved filters

[mcwumbly (Dave McClure)]

A few more related topics (original post is too old for me to edit):

• https://meta.discourse.org/t/can-we-have-favorite-categories/4497
• https://meta.discourse.org/t/what-do-you-think-about-favorited-categories/6386
• Allow users to star or favorite categories then list them at the top