Reduce artificial wait times

[Cafe137]

e.g. LightModeRestart.tsx:

if (Date.now() - startedAt < 45_000) {
  return
}

When restarting, we also wait 5s

IMO these are no longer necessary, or can be way shorter

[agazso]

This would be better to be based on the state returned by the desktop app endpoint rather than an arbitrary wait time.