deskutils/kdeconnect-kde: use security/sshpass to pass passwords to sshfs

On FreeBSD sshfs does not seem to support the "-o password_stdin" option.
Work around this limitation by using security/sshpass. This should be considered
a temporary work around until a better solution is found.

With this fix sharing of files from the device should finally work.

PR: 25303
Submitted by: Stefan Rumetshofer <sterum77@gmail.com>