Request: x-callback-url links support

Hi,

First of all thank you for the great product!

I would like to ask you about a small improvement: adding an ability of using x-callback-url links.

For instance: bear://x-callback-url/open-note?id=0139135B-455F-4737-A353-3E59581C396C-370-000055ADB6987885.

At the moment I cannot use such links because ‘http://’ part is always added before. Thank you!