[p]now doesn't use buttons when buttons are enabled

### What Red version are you using?

3.5.1

### Cog name

Audio

### Command name

now

### What did you expect to happen?

`[p]now` should use buttons like other menus in builtin cogs when `[p]set usebuttons` is toggled on

### What actually happened?

`[p]now` still uses reactions

### How can we reproduce this error?

1. `[p]set usebuttons`
2. `[p]play` a song
3. `[p]now`

### Anything else?


Start with the Audio cog's `[p]now` command and reproduce the issue after enabling `[p]set usebuttons` and playing a song. Compare its menu behavior with other builtin menus; done means `[p]now` uses buttons instead of reactions when the setting is enabled.

Written by the indexing model from the issue text.