I want to be able to lump all of my boards (in Trello) together without having to literally combine them. In other words, what I'm looking for is some sort of search function that temporarily (and not visibly) groups each board in the Team Dashboard solely to perform a search to find a single card, rather than searching each of the 10+ boards all with over 50 cards. The benefits of this are obvious, and I'm kind of confused why it seems as if it doesn't exist.
A third-party app that implements a new interface (one that has expandable contents) would even be acceptable. I've been searching for some plug-in/superpower that might fix this problem for hours. So if anybody has any ideas, it would be greatly appreciated.