Sys info (diagnostics report) amendments

[Steve-Mcl]

fixes #3771

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Proposed changes

• include flows stop/start state

  • Include flows run / stop state in the report
  • This differs from the existing runtime.isStarted (which is true if the runtime is finished initialising)

• add a handful of missing settings to basic report

  • Opportunistic chance to add a few missing items that are (functionally) inconsequential but useful for diagnostics
  • I can remove from PR if you prefer these to be in 3.1.0

Checklist

• I have read the contribution guidelines
• For non-bugfix PRs, I have discussed this change on the forum/slack team.
• I have run grunt to verify the unit tests pass
• I have added suitable unit tests to cover the new/changed functionality

[coveralls]

Coverage remained the same at 68.193% when pulling bcd3161 on Steve-Mcl:sys-info-amendments into 1b94cc3 on node-red:master.