[LVGL] The align attribute seems to be missing some functionality

[LonlyPan]

Describe the bug
I tried setting the align property of a panel to OUT_xxxx_xxxx, but it didn't seem to work. I checked the official lvgl documentation and found that using the parameter setting starting with OUT, you also need to set a target control for this setting to work, but I didn't see this option in the properties of eez. Is it not supported yet?

This is the lvgl official function：
lv_obj_align_to(obj_to_align, reference_obj, align, x, y);

To Reproduce

1. Add two panels
2. Set the align property of the second panel to the OUT_BOTTOM_MID parameter, in order to place the second panel below the first panel and align it in the middle. but it seems to fail.

Screenshots

Desktop (please complete the following information):

• OS: Windows10
• eez Version 0.21.0

** LVGL version (if used)**

• 9.x