Dashboard hangs on the loading screen after resuming a PWA

[n-lark]

Description

I suspect the intermittent PWA "stuck on the loading screen forever" is a failed initial socket connect. It fires connect_error rather than disconnect, and the reconnect loop was only wired to disconnect, so nothing retried. This starts the reconnect loop on that first failure too, so it should recover on its own instead of hanging.

Related Issue(s)

Resolves #2226

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production
• Link to Changelog Entry PR, or note why one is not needed.

Labels

• Includes a DB migration? -> add the area:migration label

[colinl]

For testing I have applied this over branch 2068-sw-auth-proxy, I presume that is ok.

[colinl]

I think you might have cracked it. I am seeing initially the same issue, but after about 10 seconds on the Loading screen there is a flicker as the Loading screen itself refreshes, and then the dashboard loads correctly.
Great work. I will continue to test it through tomorrow but it is looking good.