complete the migration to `FunctionButtonBar`

Currently, on the master (with fiji merged in) the primary colour is white; secondary is #54C1E3

For example, the primary color @colourfreak has chosen seem to be blue, but buttons are still coloured black-and-white in the following

- dialog_filter
- activity_eip681
- dialog_search
- activity_confirm
- dialog_awallet_confirmation
- activity_transaction_detail
- selector_settings_item_reverse

(In fact, I checked that none of these buttons is modified in the Fiji PR #1248 recently merged.

I need @tomekalphawallet to supply the correct values so this can be assigned to someone.