Option for specifying what is populated in the Source field

[jimhare]

For example, I would like the only "root" pages to be copyable with this widget.

Maybe use a way similar to how native fields do it, like the select box field (see query: template:) or tags field (see index: template)

I also would love the option for the widget to use a selectbox rather than an autocompleter :)

Thank you

[mogelbrod]

The reason for using the autocompletion field was make use of existing field types, while also allowing the user to copy specific files or directories that may not be pages.

Being able to specify a root page and/or depth limit for the source would be nice, but isn't something I've planned to add any time soon. You're more than welcome to make a PR for this though :)