Fixed the bug with ticket http://eden.sahanafoundation.org/ticket/1523

Fixed ticket 1523

By default the <Restriction> text box is hidden.
If <Scope> = "Public", then hide <Restriction> and <Address> is not mandatory.
If <Scope> = "Restricted", then <Restriction> text box is visible and active.
If <Scope> = "Private", then <Address> is [mandatory] and <Restriction> is hidden.