Add Missing clientEnforcement in various modals, already handled on POST also add client selection in edit trip and enforce client permissions on trips

agent/modals/invoice/invoice_edit.php

@@ -18,8 +18,10 @@ $category_id = intval($row['invoice_category_id']);
 $client_id = intval($row['client_id']);
 $client_name = nullable_htmlentities($row['client_name']);
 
-// Generate the HTML form content using output buffering.
+enforceClientAccess();
+
 ob_start();
+
 ?>
 
 <div class="modal-header bg-dark">