SSE behind the PWA Service Worker

[haimkastner]

From some unknown reason for me, the SSE events stopped working after a few seconds, so the dashboard not updating with the server updates (in the incognito mode, its works properly)

[haimkastner]

There is no real fix for it right now.
The fix should be by using other techniques than SW.
https://stackoverflow.com/questions/35837967/increase-service-worker-life-time/48992309#48992309
https://stackoverflow.com/questions/29741922/prevent-service-worker-from-automatically-stopping

So, for now the default is to not install SW.

[haimkastner]

By #81