Refactor contact management functions and remove phpinfo.php

- Updated formatting and structure of functions in edit_contact.inc.php for better readability and consistency.
- Added comments to clarify the purpose of certain code sections, especially regarding mandant handling.
- Removed the deprecated phpinfo.php file to clean up the codebase.

module/gallery/collection_gallery_line_listform.inc.php

@@ -24,7 +24,7 @@ $input_collection_id = (isset($_REQUEST["input_collection_id"]) ? $_REQUEST["inp
     <input type="hidden" id="module_input_gallery_<?= $fieldSetup['id']; ?>" name="module_input_gallery_<?= $fieldSetup['id']; ?>" value="" />
 
     <ul class="toolbar_menu">
-        <?= button("new", $translation->get("new"), $formname, "openGallery('module_input_gallery_".$fieldSetup['id']."', 'null', 'collection')", "", FALSE); ?>
+        <?= button("new", $translation->get("new"), $formname, "openGallery('module_input_gallery_".$fieldSetup['id']."', 'null', 'collection', 'multi')", "", FALSE); ?>
         <?= button("up", $translation->get("go_up"), $formname, "loadCard('moveup_line_gallery')", "", FALSE); ?>
         <?= button("down", $translation->get("go_down"), $formname, "loadCard('movedown_line_gallery')", "", FALSE); ?>
 

module/gallery/edit_gallery_line_cardform.inc.php

@@ -83,7 +83,7 @@ if ($messages !== null) {
                 <td>
                     <div class="label"><?php echo $translation->get("preview"); ?></div>
                     <?php echo $input_line['preview']; ?>
-                    <input type="hidden" name="preview" value="<?php echo $input_line['preview']; ?>" />
+                    <input type="hidden" name="preview" value="<?php echo htmlspecialchars($input_line['preview'], ENT_QUOTES, 'UTF-8'); ?>" />
                 </td>
                 <td>
 
@@ -158,5 +158,5 @@ if($input_line["id"] == "") {
         }
     </script>
     <?php
-} // end $input_line['preview'] != ""
+}
 ?>