Setup hotfix: Custom Appbar

[pnv2003]

How to create a custom appbar with some actions:

const customAppbar = (
    <CustomAppbar>
        <Appbar.Action icon={...} onPress={...} />
        <Appbar.Action icon={...} onPress={...} />
        <Appbar.Action icon={...} onPress={...} />
        ...
    </CustomAppbar>
);