[Users] Unwanted option on right click menu

[Liz]

I've accidentally made an unwanted option on my right click menu for my
mailbox folders.
I had sticky keys on my trackball which led to this happening, but I'm
not sure how it can be reversed.
I have dismantled and cleaned the trackball so it won't be happening
again.

Claws Mail version 3.14.1
XFCE desktop on Debian buster/sid

Attached screenshot shows the new option "XF86AudioRaiseVolume" which
has been added to the "Mark all read" option line.

Can someone advise me how I can remove this?

Liz
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