Only show 'Manage Account Links' when necessary (#25311)

If it is not possible to add or manage an account link, the menu
will not be shown to the user.

templates/user/settings/security/accountlinks.tmpl

@@ -1,3 +1,5 @@
+{{/* No account links, no way to add account links: Menu will not be shown. */}}
+{{if or .AccountLinks .OrderedOAuth2Names}}
 <h4 class="ui top attached header">
 	{{.locale.Tr "settings.manage_account_links"}}
 	{{if .OrderedOAuth2Names}}
@@ -23,7 +25,6 @@
 		<div class="item">
 			{{.locale.Tr "settings.manage_account_links_desc"}}
 		</div>
-		{{if .AccountLinks}}
 		{{range $loginSource, $provider := .AccountLinks}}
 			<div class="item gt-df gt-ac">
 				<div class="gt-f1">
@@ -37,7 +38,6 @@
 				</button>
 			</div>
 		{{end}}
-		{{end}}
 	</div>
 </div>
 
@@ -51,3 +51,4 @@
 	</div>
 	{{template "base/modal_actions_confirm" .}}
 </div>
+{{end}}