"Custom font size" for main menu text does nothing

[stefonarch]

As title, seen everywhere also in WM.

Expected Behavior

Font size should change.

Current Behavior

Remains always LXQt default. Related: #1975 (comment)

Possible solution:

Fix it or remove the option, as apparently no one used it ever.

Steps to Reproduce (for bugs)

1. Configure Main Menu
2. Set a text for the button
3. Try to change size

System Information

• LXQt Version: all
• Distribution & Version: all

[stefonarch]

Instead it works, but for the menu items not for the text label.