[4.6.0] Can't query or change call waiting setting

[wetab73]

@direc85

Querying/changing (at least) call waiting status doesn’t work with 4.6.0 Sauna EA.

It hasn’t been working for years. See e.g. (mid-2022):

Call forwarding not working in 4.4.0.68

@slava, on my just bought and SFOS-enabled X10 III I am also unable to query the state of Call Waiting as well as Call Barring.

or (early 2024):

Call forwarding not working in 4.4.0.68

Still not working on 4.5.0.24, either. Not just call forwarding but also call barring and call waiting. Call forwarding settings also behave strangely.