[Bug]: Regression in apps using data-apps-slide-toggle for settings toggle button

[AsamK]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

The settings can't be opened anymore some apps with NextCloud 27 (and newer). In apps that use the data-apps-slide-toggle attribute for implementing the settings toggle button the settings button doesn't work anymore.
Affects at least the News (nextcloud/news#2242) and Activity (nextcloud/activity#1199) apps.

The issue has been introduced in #36534, which removed the code handling the data-apps-slide-toggle attribute. This attribute is still documented for NextCloud 27 (https://docs.nextcloud.com/server/27/developer_manual/html_css_design/navigation.html#settings) so it was probably removed unintentionally and should be added back.

This is the code that needs to be added back:

• https://github.com/nextcloud/server/pull/36534/files#diff-ef8ad78d200f5a9cb815161aa620ca6ef324f9c5d9cd1453ac72bb9447174fe8
• https://github.com/nextcloud/server/pull/36534/files#diff-3c9d8a8e67f44448736aac4deec4137721dff26ad5deb9c885518b43e410f66e

Steps to reproduce

1. Install news (beta) or activity app on NextCloud 27
2. Click the settings button in the left bottom corner
3. -> nothing happens

Expected behavior

When clicking the settings button, the settings should open.

Installation method

Community Manual installation with Archive

Nextcloud Server version

27

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.2

Web server

Apache (supported)

Database engine version

MariaDB

Is this bug present after an update or on a fresh install?

Upgraded to a MAJOR version (ex. 22 to 23)

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

No response

List of activated Apps

No response

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

No response

[szaimen]

Cc @skjnldsv

[skjnldsv]

Hum, my bad, I don't remember searching for usage of that old feature, but I should have documented it! ⚠️