Found in decompiled source that are not used in the game but work / may work:
scripting.game_interface:override_uiall:works: - disable_reinstate_legacy - disable_cancel_research broken (imho): - disable_tax_slider - disable_cancel_movedisable_event_panel_auto_open disable_enlist_general disable_settlement_labels disable_repair_building disable_dismantle_building disable_disband_unit disable_upgrade_unit disable_scupper_ship disable_character_information_panel disable_region_information_panel disable_enlist_agent disable_enlist_geisha disable_enlist_metsuke disable_enlist_missionary disable_enlist_monk disable_enlist_ninja disable_trade_tab disable_summary_tab disable_diplomacy disable_tax_slider disable_cancel_move disable_cancel_construction disable_cancel_recruitment disable_cancel_research disable_cancel_siege_equipment disable_selection_change disable_character_selection disable_settlement_selection disable_campaign_tactical_map disable_finance_button disable_missions_button disable_tech_button disable_clan_button disable_end_turn disable_event_panel_auto_open disable_enlist_general disable_settlement_labels disable_repair_building disable_dismantle_building disable_disband_unit disable_upgrade_unit disable_scupper_ship disable_character_information_panel disable_region_information_panel disable_enlist_agent disable_enlist_geisha disable_enlist_metsuke disable_enlist_missionary disable_enlist_monk disable_enlist_ninja disable_trade_tab disable_summary_tab disable_diplomacy disable_tax_slider disable_cancel_move disable_cancel_construction disable_cancel_recruitment disable_cancel_research disable_cancel_siege_equipment disable_selection_change disable_character_selection disable_settlement_selection disable_campaign_tactical_map disable_finance_button disable_missions_button disable_tech_button disable_clan_button disable_advice_changes disable_prebattle_attack disable_prebattle_autoresolve disable_prebattle_continue disable_prebattle_retreat disable_campaign_dropdowns disable_dismiss_advice_end_turn disable_enlist_navy disable_recruit_units disable_recruit_mercenaries disable_construction_site disable_incentives_stack disable_stances_stack disable_stances_except_fortify disable_replace_general disable_tax_exempt disable_reinstate_legacy disable_non_selected_settlements disable_cost_display disable_side_panels disable_character_details_panel disable_end_of_turn_warnings disable_all_movies disable_windowed_movies disable_recruitment_infinity_icon disable_sally_forth_button disable_subjugation_button