SignatureDialog: Use ListStore

[danirabbit]

can't use get_children in GTK4. We can technically iterate over the listbox still, but it's better to iterate over data

[jeremypw]

I think the filter function will have to be reimplemented a different way, otherwise looking good.

[jeremypw]

Isn't this ignored when bound to a model? I get the terminal message GtkListBox with a model will ignore sort and filter functions

[danirabbit]

@jeremypw in GTK4 we can use a filter list model. Does this not work for you?

[jeremypw]

@jeremypw in GTK4 we can use a filter list model. Does this not work for you?

In Gtk4 you still cannot use the set_filter_func function of the ListBox but yes, you could wrap the model in a Gtk.FilterListModel. I haven't looked deeply into it but the code looks weird anyway - the filter is dependent on the presence/absence of a timout. I would have thought there is a better way of doing it. Can't we just remove the item from the model when it starts to get deleted?