Need a better UI for boards with many Quick Filters

When there are many quick filters, the header area on the scrum board becomes unwieldy. This is especially a problem with scrum boards where you may need a different set of filters for planning than for work.

Also, I frequently find myself creating multiple buttons for related ideas, e.g. separate filters for major+ vs. minor- priorities. If there were a way to define a quick filter that was a select box, that would clean things up a lot.