This reverts commit 3be57c29.

- More updates according to UI translations

- Some updates according to UI translations

- UG-37 Docu for: Improve usability of desktop notifications
- UG-39 Update: replace the App name 'E-Mail' by 'Mail'
- Removed: Docu for: As a new user I have a first start wizard
- Some minor fixes

- UG-34 Improvement: Describe the differences between searching for files and for folders in Drive
- UG-36 Docu for: Improve time zone picker usability
- UG-25 Docu for: As a new user I have a first start wizard that guides me through the basic setup

- Docu for: Searching in mail body must be optional

- Improvements for the topic structure

Updates due to
- DOCS-5135 Activate file and folder Search in 'Current folder' for external storage accounts
- OXUIB-2771 L3 Error message instead of a kind of warning when searching in unified mailbox folder

- Docu for: Streamline App Suite settings design and ordering

- Docu for: As a user I can browse in categories

- More updates for the Guard user docu due to UI changes

Changed: Helm: Make security context configuration overwritable

See merge request frontend/user-guide!13

- Update the docu regarding OXUIB-2744
- Docu for: OXUIB-2635: Automatically select top suggestion in to/cc/bcc on enter

- Improvements for the topic structure, step #2

- Fix the Docu for using AI functions while composing an email
- Check the visibility of the topic 'Sending emails later'

- Docu for: Hard to find the "copy to description" link
- Improved topic structure