Expand the user menu options on the MKS LVGL user interface information screen.

[1qaz2004]

Is your feature request related to a problem? Please describe.

Marlin provides the ability to set custom menu items in the Configuration.h file, Custom Menu: Main Menu section.
Up to 25 custom menu items can be set here.
The user can independently configure the execution of various commands using the G-code (tests, calibrations, information output, etc.).

Are you looking for hardware support?

MKS Robin Nano V3, Display MKS TS35

Describe the feature you want

For the MKS user interface that uses LVGL_UI, only 6 custom commands can be specified in the Tool<More menu.
If there are more commands, then the firmware compiles normally, but there is no access to menu items greater than 6.
It is proposed to expand the MKS LVGL_UI user interface menu by adding additional screens for which:

• replace the "back" button with two buttons "Back", "Next" to switch between screens
• add additional screens to the MKS LVGL_UI interface to set custom More menu commands.
  This will allow you to take full advantage of the Marlin firmware for the MKS LVGL interface.

Additional context

No response