Remembering SSH Pass Phrase

[WhatUsernameIsFree?]

Hi all,

I've upgraded my wife's laptop from Ubuntu to LMDE. Unfortunately, it's not going very smoothly. Despite installing exactly the same software (ie, both as per standard), it's behaving differently. When I ssh into my desktop, I'm presented with a graphical box, which gives me the option to remember my pass phrase associated to my ssh-key, my wife doesn't get this box.

How can I get this graphical box up to click the button to remember the pass phrase?

Thanks