Disable service worker if web home changes

[zwimer]

If you enable this WebUI, then disable it (in Chrome at least), the WebUI has a nasty habit of sticking around, even after the WebUI files have been deleted, environment variable removed, transmission restarted, cache's cleared, and hard-reloading. It might vanish if you reload a few times, but load the page in a new tab and it'll reappear once more. After poking around, I noticed that the Chrome was still trying to run a service worker for flood; unregistering that fixed this issue for me by going to Developer Tools > Applications > Service Workers.

It'd be nice to be able to temporarily disable this or change the WebUI freely. I've had this issue with flood before, when I wanted to temporarily change the WebUI- I couldn't disable flood's UI even after purging the files. After I finally managed to purge flood from my browser, instead of returning to it as I intended, I never did because I didn't want to have to re-install my browser (again) just to disable it later if I needed to. I recently returned to try flood again but when I went to temporarily disable it this issue returned.

That is all to say, this software must be trivial to fully disable if the user desires to temporarily use a different WebUI, it shouldn't stick around.