The thread pool is used to fetch album art in the background, but this
can slow down most tests that aren't interested in album art. Adding a
(testing-only) function for running without the thread pool speeds
things up a bit.
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>
I decided that having a uniqueue history queue doesn't really get me
anything, so I dropped that portion of the behavior.
Signed-off-by: Anna Schumaker <Anna@OcarinaProject.net>