[LVGL] Tab Header customization not working with LVGL 9.x

[uniroll]

Customization of the 'Items part' -> 'CHECKED' parameters have no effect with LVGL V9.x.

Working when switching to LVGL V8.x.

Tested with EEZ Studio 0.27.1

The issue is related to the LVGL Version selected for the project.

The example project works as long the LVGL version is 8.x, if change to 9.x the border side change it no longer works.

Originally posted by @arturv2000 in #841