Datahub: Some minor improvements

[tkohr]

Description

This PR adds a comment on organization filters in the default.toml and makes the max-lines gradient a little smoother.

Screenshots

[github-actions]

Affected libs: ui-layout, feature-catalog, feature-record, feature-router, feature-editor, feature-map, feature-dataviz, ui-elements, feature-notifications, feature-search, ui-catalog, ui-search,
Affected apps: metadata-editor, datahub, demo, webcomponents, map-viewer, search, datafeeder,

• 🚀 Build and deploy storybook and demo on GitHub Pages
• 📦 Build and push affected docker images

[github-actions]

📷 Screenshots are here!

[coveralls]

coverage: 83.465% (+0.03%) from 83.434%
when pulling 1a99789 on dh-improvements
into 822d2a4 on main.

[jahow]

thanks!