Setting notification preferences from the transient menu does not work

### OS/platform

NixOS 23.11.20230901.aa8aa7e (Tapir)

### Emacs version and provenance

Tested on both:
- `GNU Emacs 29.1 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 1.16.0, Xaw3d scroll bars)`
- `GNU Emacs 28.2 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 1.16.0, Xaw3d scroll bars) `
Installed using with-emacs.sh, from the Nixpkgs repos:
1. `nix-shell -p emacs` or `nix-shell -p emacs29 -I nixpkgs=https://github.com/NixOS/nixpkgs/archive/976fa3369d722e76f37c77493d99829540d43845.tar.gz` depending on version.
2. `./with-emacs.sh -i ement`

### Emacs command

`./with-emacs.sh -i ement`

### Emacs frame type

GUI and tty

### Actions taken

1. Run `./with-emacs.sh -i ement`
2. Type `M-x ement-connect RET`
3. Login to my matrix.org account
4. Enter a room
5. Type `?`
6. Type `r n`
7. Type `None RET` or `Mentions RET` at the prompt

### Results

Desktop notifications continued to be received regardless of content or notification preferences.

### Expected results

1. On typing `None RET`
No longer receiving any desktop notifications.
2. On typing `Mentions RET`
Receiving only desktop notifications for messages mentioning me.

### Backtrace

_No response_

### Etc.

_No response_