FrontierNav Search Performance

I've become more comfortable using Web Workers now. My first implementation of it for the Universal Search had a single global Worker searching across multiple indexes. Now, there's one for each index, created only when Search is activated and discarded after. I really can't tell what difference it's made since there aren't any Dev Tools that show individual performance metrics, but from an implementation point of view, it makes a lot more sense. There's no point having Workers waiting around, hogging resources.