Material checkbox menu appearance problems #258

Issue Overview

Material checkbox menu doesn't look well, see the pictures below.

Current Behaviour

1. Labels overlap:
   

2. When the menu is focused, its label ("Material checkbox menu") disappears:
   

3. If a checkbox is clicked several times, it gets a different style ("Paris" in this case):
   

Expected Behaviour

The label "Material checkbox menu" should stay above, e.g.:

and there are no obvious reasons why checkboxes should look differently after unchecking and checking again.

How to reproduce

The problems can be seen in AdminFaces Showcase application.

Additional Information

• AdminFaces version: 1.6.1
• PrimeFaces version: 11.0.0
• Browser version: Chrome 112.0.5615.138 (Official Build) (64-bit)