ibrdavid

[ ] bug report => Search github for a similar issue or PR before submitting [x] feature request => Please check if request is not on the roadmap already https://github.com/primefaces/primevue/wiki/Roadmap...

### Describe the bug SubHeader Grouping doesn't work with theme 'mdc-light-indigo'. The headers overwrite eachother.  https://codesandbox.io/s/quirky-dream-pxthg1 ### Reproducer _No response_ ### PrimeVue version 3.16.2 ### Vue version 3.x ###...