Implemented linker - class for admin_updates.php (templates automatic replace only)

Signed-off-by: Florian Aders (EleRas) <eleras@froxlor.org>

templates/Classic/admin/update/index.tpl

@@ -1,5 +1,5 @@
 $header
-	<form action="$filename" method="post">
+	<form action="{$linker->getLink(array('section' => 'updates'))}" method="post">
 		<input type="hidden" name="s" value="$s"/>
 		<input type="hidden" name="page" value="$page"/>
 		<input type="hidden" name="send" value="send" />

templates/Froxlor/admin/update/index.tpl

@@ -3,7 +3,7 @@ $header
 		<h2>{$lng['update']['update']}</h2>
 	</header>
 	<article>
-		<form action="$filename" method="post">
+		<form action="{$linker->getLink(array('section' => 'updates'))}" method="post">
 			{$update_information}
 			<p class="submit">
 				<input type="hidden" name="s" value="$s"/>