Fix org members bug (#20489)

* Fix bug in public only org members list

bug was introduced in d6779c7ad3

* Expanded org unit test

templates/org/member/members.tmpl

@@ -29,7 +29,7 @@
 							{{end}}
 						</div>
 					</div>
-					{{if not .PublicOnly}}
+					{{if not $.PublicOnly}}
 						<div class="ui three wide column center">
 							<div class="meta">
 								{{$.locale.Tr "org.members.member_role"}}