So this is the properties window created in a proper way with a template.
I used a
GtkDialog as a parent class instead of
HdyWindow because it has the escape shortcut (I don't know if it's a valid reason).
Also, the property name for title is
media-title to avoid conflict with the
title property of
I did this way as to avoid as much as possible heavy changes. Please let me know if you're not okay with it.