- UG-89 Feature: Implement the new AI icon & polish some wording

Related to https://gitlab.open-xchange.com/appsuite/web-apps/translations/-/issues/69

- UG-43 Docu for: Install App Suite on various devices via PWA

Relates to https://gitlab.open-xchange.com/appsuite/web-apps/translations/-/issues/64
Relates to https://gitlab.open-xchange.com/appsuite/web-apps/translations/-/issues/50
Relates to https://gitlab.open-xchange.com/appsuite/web-apps/translations/-/issues/66
Relates to https://gitlab.open-xchange.com/appsuite/web-apps/user-guide/-/issues/70

- UG-69 Enhancement: Update some headlines and wording according to UI
- UG-72 Defect: Some outdated wording in the settings docu

Related to #66

- Fix breadcrumb issues in separated legal notice

- adjust basic margin

Related to #45

- Revive the topic 'First start wizard' in the docu version 8.29
- Enhancement: Add breadcrumbs navigation to the Online Help

- UG-53 Docu for: Feature: Allow users to set individual font sizes for most emails

- Include the legal notice to the start page
- Remove the separate legalnotice file to fix breadcrumb issues causing failed consistency check.

- Enables breadcrumbs to be toggled via feature toggle

- UG-56 Enhancement: Add missing infos and fix outdated content in calendar and contacts
- UG-45 Enhancement: Add breadcrumbs navigation to the Online Help

- UG-28 Improvements for the topic structure, step #4
- UG-36 Docu for: Improve time zone picker usability
- UG-49 Chore: Update the settings Docu according to UI changes
- UG-53 Docu for: Feature: Allow users to set individual font sizes for unformatted emails

This reverts commit 3be57c29.

- More updates according to UI translations