Metadata editing & zones handling

[tkurki]

Add support for editing metadata and zones handling = raising notifications based on deltas in the server. Previous work with meta deltas with PUT support makes this pretty straightforward.

The goal of this PR is to add the functionality, not be pretty - let's get the initial end2end functionality out there.

Todo:

• state handling & save
• add /delete field
• separate "edit mode"
• units as select, not a text field
• alertmethods as checkboxes
• notifications triggering based on zones
• default alertMethods? if none provided in metadata

[tkurki]

[tkurki]

For the zones to work we need to either move the zones threshold-state handling logic to server proper or make the plugin use zones data from the server. If the zones editing is going to be in the server admin ui I don't see much point in keeping the plugin around, so integrating the logic in the server seems the best option.

[tkurki]

I enabled building docker container for this branch, so you can check it out with docker pull signalk/signalk-server:metadata-editing && docker run --init --rm -it -p 3000:3000 -v /tmp/:/home/node/.signalk --entrypoint /usr/lib/node_modules/signalk-server/bin/signalk-server signalk/signalk-server:metadata-editing --sample-nmea0183-data

[panaaj]

I get the "Something went wrong." message in the data browser screen when selecting "zones" from the dropdown. It throws the following error with the console.

 TypeError: e.map is not a function
    at Pe (Meta.js:456:16)
    at Gi (react-dom.production.min.js:153:146)
    at Ua (react-dom.production.min.js:175:309)
    at To (react-dom.production.min.js:263:406)
    at Eu (react-dom.production.min.js:246:265)
    at xu (react-dom.production.min.js:246:194)
    at mu (react-dom.production.min.js:239:172)
    at react-dom.production.min.js:123:115
    at t.unstable_runWithPriority (scheduler.production.min.js:19:467)
    at Kl (react-dom.production.min.js:122:325)

Given there is a separate "zones" section it should probably be filtered out from the dropdown list.

[tkurki]

Nice! Fixed in 038a5da