That is different issue.
When changing between alternative menus, the flat categorization will return as part of the Maui default setting. You'll need to right click on the menu, and change this behaviour in the selected menus own settings. Another option would be to edit the menu containment section of ~.config/plasma-org.kde.plasma.desktop-appletsrc directly.
In the following example, you would need to change limitDepth=true to limitDepth=false in order to show sub-categories.
When changing between alternative menus, the flat categorization will return as part of the Maui default setting. You'll need to right click on the menu, and change this behaviour in the selected menus own settings. Another option would be to edit the menu containment section of ~.config/plasma-org.kde.plasma.desktop-appletsrc directly.
In the following example, you would need to change limitDepth=true to limitDepth=false in order to show sub-categories.
Quote:[Containments][1][Applets][2]
immutability=1
plugin=org.kde.plasma.kickerdash
[Containments][1][Applets][2][Configuration][Shortcuts]
global=Alt+F1
[Containments][1][Applets][2][Shortcuts]
global=Alt+F1
[Containments][1][Applets][2][Configuration][General]
favoriteApps=systemsettings.desktop,org.kde.ksysguard.desktop,octopi.desktop,vokoscreen.desktop
limitDepth=true