Some updates to the UI specific issue template.
The previous 'Old UI or New UI' question is no longer relevant and considering the amount of visual change we've had, this leads to folks answering things like 'Consul 1.10.0+ent with new, new UI'. Now it's just "The Consul UI".
I mainly took the rest from the current Consul Core issue template but made it relevant to the UI both for issues/bugfixes and for suggestions/improvements.
From an engineers perspective, whenever specifying colors from now on we should use the form:
```
color: rgb(var(--tone-red-500));
```
Please note:
- Use rgb. This lets us do this like rgb(var(--tone-red-500) / 10%) so we can use a 10% opacity red-500 if we ever need to whilst still making use of our color tokens.
- Use --tone-colorName-000 (so the prefix tone). Previously we could use a mix of --gray-500: $gray-500 (note the left hand CSS prop and right hand SASS var) for the things we need to theme currently. As we no longer use SASS we can't do --gray-500: --gray-500, so we now do --tone-gray-500: --gray-500.
Just for clarity after that, whenever specifying a color anywhere, use rgb and --tone. There is only one reason where you might not use tone, and that is if you never want a color to be affected by a theme (for example a background shadow probably always should use --black)
There are a 2 or 3 left for the code editor, plus our custom-query values
> In the future, this should all be moved to each individual repository now, which will mean we can finally get rid of this service.
This PR moves reconciliation to 'each individual repository'. I stopped short of getting rid of the service, but its so small now we pretty much don't need it. I'd rather wait until I look at the equivalent DataSink service and see if we can get rid of both equivalent services together (this also currently dependant on work soon to be merged)
Reconciliation of models (basically doing the extra work to clean up the ember-data store and bring our frontend 'truth' into line with the actual backend truth) when blocking/long-polling on different views/filters of data is slightly more complicated due to figuring out what should be cleaned up and what should be left in the store. This is especially apparent for KVs.
I built in a such a way to hopefully make sure it will all make sense for the future. I also checked that this all worked nicely with all our models, even KV which has never supported blocking queries. I left all that work in so that if we want to enable blocking queries/live updates for KV it now just involves deleting a couple of lines of code.
There is a tonne of old stuff that we can clean up here now (our 'fake headers' that we pass around) and I've added that to my list of thing for a 'Big Cleanup PR' that will remove lots of code that we no longer require.
Add changelog to document what changed.
Add entry to telemetry section of the website to document what changed
Add docs to the usagemetric endpoint to help document the metrics in code
This commit two test failures:
1. Remove check for "in legacy ACL mode", the actual upgrade will be removed in a following commit.
2. Remove the early WaitForLeader in dc2, because with it the test was
failing with ACL not found.
