fix filter submit button

src/ListJsonTable.php

@@ -73,8 +73,8 @@ class ListJsonTable extends JasonTable
         }
         if ($this->showFiltersRow) {
             $this->getFilters($columnKeys);
-            $this->html .= "</thead>";
         }
+        $this->html .= "</thead>";
     }
 
     public function createTbody(): void
@@ -271,8 +271,10 @@ class ListJsonTable extends JasonTable
     private function getFilters(array $columnKeys): void
     {
         $this->html .= "<tr><form action='$this->baseUrl/search'>";
+        $flag = false;
         foreach ($columnKeys as $key) {
             if ($this->issetFilter($key)) {
+                $flag = true;
                 $filter = $this->getCurrentFilter($key);
                 $params = [
                     'param' => $filter['param'] ?? '',
@@ -290,7 +292,8 @@ class ListJsonTable extends JasonTable
                 $this->html .= "<td></td>";
             }
         }
-        if ($this->showActionColumn) {
+        if ($flag) {
+            $this->showActionColumn = true;
             $this->html .= "<td><input class='btn btn-primary' type='submit' style='width: 150px' value='Применить'></td>";
         }
         $this->html .= "</form></tr>";