Cleanup and improve configuration page

[kavics]

• ".settings" postfix removed from the titles
• "Learn more" href fixed.
• "Learn more" links are displayed only if there is documentation for that setting (hardcoded whitelist).
• "Delete" icon button added to the custom config files (hardcoded blacklist).

[sensenet[bot]]

Site name	Url	Last deploy
sn-app-dev	https://655b2f898c6c876fa254fa2e--sn-app-dev.netlify.app	Mon Nov 20 2023 - 10:06:02 GMT+0000 (Coordinated Universal Time)
sn-react-component-docs-dev	https://655b2fc451cc1b6f873ba266--sn-react-component-docs-dev.netlify.app	Mon Nov 20 2023 - 10:07:01 GMT+0000 (Coordinated Universal Time)

[sensenet[bot]]

Site name	Url	Last deploy
sn-app-dev	https://6556cd4fd3a2173982f0e427--sn-app-dev.netlify.app	Fri Nov 17 2023 - 02:17:56 GMT+0000 (Coordinated Universal Time)
sn-react-component-docs-dev	https://6556cd50ea424e3b0a809176--sn-react-component-docs-dev.netlify.app	Fri Nov 17 2023 - 02:17:55 GMT+0000 (Coordinated Universal Time)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (8d97b92) 92.52% compared to head (3f0eb17) 92.52%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #1584 +/- ## ======================================== Coverage 92.52% 92.52% ======================================== Files 250 250 Lines 7068 7068 Branches 1915 1915 ======================================== Hits 6540 6540 Misses 528 528 ```

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