Improve again completion result of microprofile-config.properties

[angelozerr]

Here a sample of completion item result:

{
      "label": "quarkus.management.filter.{*}.matches",
      "kind": 10,
      "filterText": "quarkus.management.filter.${1:key}.matches",
      "textEditText": "quarkus.management.filter.${1:key}.matches=$0",
      "data": {
          "propertyName": "quarkus.management.filter.{*}.matches",
          "uri": "file:///c%3A/Users/azerr/git/quarkus-blast/src/main/resources/application.properties"
      }
  }

I think we can improve again the result to have a lower JSON result since completion for microprofile-config.properties can return a lot of items.

It should be nice to return only:

{
      "label": "quarkus.management.filter.{*}.matches",
      "kind": 10,
      "textEditText": "quarkus.management.filter.${1:key}.matches=$0"
  }

• filterText can be removed and LSP cient will use label instead which will be better since filterText contains snippet syntax ("filterText": "quarkus.management.filter.${1:key}.matches"
• data/propertyName is the same value than label, so we can remove it and use label.
• data/uri are the same for all completion items, so we can move this information in CompletionItemDefaults/data

@JessicaJHee what do you think about that?

[JessicaJHee]

I'm interested in working on this!

[rgrunber]

Just something to be aware of because I noticed you mention attempting to de-duplicate data fields of a completion item, https://github.com/eclipse/eclipse.jdt.ls/issues/2621#issuecomment-1524259869 . So even if data were supported (it isn't for vscode-languageclient), the behaviour is not to merge data fields, but to have the more specific (eg. item.data override list.itemDefaults.data)