add custom columns filter

src/ListJsonTable.php

@@ -251,7 +251,7 @@ class ListJsonTable extends JasonTable
         $this->html .= "<tr><form action='$this->baseUrl/search'>";
         foreach ($columnKeys as $key){
             if ($this->issetFilter($key)){
-                $this->html .= "<td><input type='text' name='$key'></td>";
+                $this->html .= "<td><input type='" . $this->getFilterFromCustomColumn($key) . "' name='$key'></td>";
             }
             else {
                 $this->html .= "<td></td>";