Change account security icon from key to lock, make code a bit more readable

apps/account_security.php

@@ -8,7 +8,12 @@ addMultiLangStrings(["en_us" => [
 ]);
 $APPS["account_security"]["i18n"] = TRUE;
 $APPS["account_security"]["title"] = "account security";
-$APPS["account_security"]["icon"] = "key";
+$APPS["account_security"]["icon"] = "lock";
-$content = "<p>" . lang("manage security description", false) . '</p> <a href="home.php?page=security" class="btn btn-primary btn-block">' . lang("manage account security", false) . '</a>';
+$content = "<p>"
+        . lang("manage security description", false)
+        . '</p> '
+        . '<a href="home.php?page=security" class="btn btn-primary btn-block">'
+        . lang("manage account security", false)
+        . '</a>';
 $APPS["account_security"]["content"] = $content;
 ?>