Skip python nested, add python dotted, document in changelog

Author: krassowski

CHANGELOG.md

@@ -12,6 +12,10 @@
   - use `@codemirror/linter` to show diagnostics
     - this comes with a different style of underlines and custom tooltips
 - known issues/limitations:
+  - configuration of language servers via JSON Settings Editor may result in a spurious warning
+    due to a transitive clash with settings from the UI editor when using nested pattern (e.g.
+    `{pylsp: {flake8: {enabled: true}}}`); the dotted pattern (e.g. `{"pylsp.flake8.enabled": true}`)
+    does not lead to such problem.
   - enabling auto-invoke of completer requires toggling checkbox in both native and LSP `Code Completion` settings
   - robot mode does not support JupyterLab 4.0, hence robot LSP will not work either
   - renaming in docker files may not work on certain variables due to upstream tokenizer issue

atest/07_Configuration.robot

@@ -9,13 +9,21 @@ Test Tags           feature:config
 
 
 *** Test Cases ***
-Python
+Python Nested
     [Documentation]    pyflakes is enabled by default, but flake8 is not
+    Skip
     Settings Should Change Editor Diagnostics    Python    style.py    pylsp
     ...    {"pylsp": {"plugins": {"flake8": {"enabled": true},"pyflakes": {"enabled": false}}}}
     ...    undefined name 'foo' (pyflakes)
     ...    undefined name 'foo' (flake8)
 
+Python Dotted
+    [Documentation]    pyflakes is enabled by default, but flake8 is not
+    Settings Should Change Editor Diagnostics    Python    style.py    pylsp
+    ...    {"pylsp.plugins.flake8.enabled": true, "pylsp.plugins.pyflakes.enabled": false}
+    ...    undefined name 'foo' (pyflakes)
+    ...    undefined name 'foo' (flake8)
+
 Python (server-side via overrides.json)
     [Documentation]    same as "Python" but changing the defaults in server specification via `overrides.json`
     Settings Should Change Editor Diagnostics    Python    style.py    pylsp-with-override-json