Active sublayer in widget Select?

[CarolinaAguilar_Aravena]

I need to activate a sub-layers since Select widget, I need this process to improve user assistance experience. Since to use this function the user must return to the list and this process is not very fast for the user (Figure).

I need a code, since I am doing this in WAB for developers, editing the application code. Anyone know how to do this?