StaticDEFAULT_StaticPARTSStaticTABSStaticTEMPLATE_Attach show/filter/select behaviour to a single .mod-field-combobox element.
Build the grouped field list for the modifications combobox. Gear upgrades show gear-specific fields plus the standard actor-level fields.
Array of { group, value, label }
Rebuild a modification row's operation select to only show ops valid for the given field.
Determine the modification field category from a field string.
Static_Static_Static_Static_Static_Static_Static_
AppV2 sheet for Gear Upgrade items.