Repro is with Brim commit 0a07e2a.

As shown in the attached video, rapid creation of lots of pools causes quick stacking of "Load Successful" pop-ups.

While human users may not typically work this fast, this is currently causing a challenge when trying to improve the e2e test in #2602, since it's not possible for the automation to know with certainty which "Load Successful" or "Load error" pop-up corresponds to which pool creation step.

One way to deal with this is to just wait for each new pop-up to clear on its own before proceeding to the next test step, but it takes several seconds for each one to disappear, so that slows down the test. An improvement I proposed would be to allow quicker dismissal of the pop-ups, such as via clicking them. This is something that even users may appreciate, so @jameskerr agreed this is something worth pursuing.