create_db: Add password generator popover
Adds a button next to the input to generate a random password when creating a safe.
Fixes: https://gitlab.gnome.org/World/PasswordSafe/-/issues/144
Edited by Maximiliano
Adds a button next to the input to generate a random password when creating a safe.
Fixes: https://gitlab.gnome.org/World/PasswordSafe/-/issues/144