Configuring reserved button

Filters API has a third button for all tabs. Usually, it can be used to open the options' menu.

INFO

The core of the button is onPress, the shows of the button depend on whether onPress is null.

Call FilterBuilder.setReservedButton(ItemGroup, Text, PressAction) to add the "Reserved button".

FilterBuilder.setReservedButton(CREATIVE_MODE_TAB, new TranslatableText("tooltip.modid.options"), button -> foo());