Hello,
for 'Unlimited' field in the pop-up window, rather than doing a Web Dynpro Component Configuration enhancement (which cannot be tracked by changed version), implement enhancement spot WD_BADI.
Implement BAdI definition WD_BADI_DOMODIFYVIEW and WDDOMODIFY method:
DATA: lr_checkbox TYPEREFTO cl_wd_checkbox
lr_checkbox ?= view->get_element( 'UNLIMITED' ).
IF lr_checkbox ISBOUND.
CALLMETHOD lr_checkbox->set_visible
EXPORTING
value = '1'.
ENDIF.
Regards.
Laurent.