gDNA page blocks the webserver without UI indication

While working through testing of #468, I added a plate on the gDNA plate extraction page. This took about 30 seconds to do, with high observed load on postgres (less so on the python process). During this time, the webserver was unresponsive, demonstrated by the subsequent portion of the .gif below where plates are added followed by attempts to navigate away from the page.

My test database has an additional 10 amplicon plates, and 10 shotgun 384-well plates as loaded by the stress testing script. It is unclear if the volume of data in the local test database is associated with this issue.