added image search button, added image loader to webpack

web/modules/custom/materio_sapi/src/Form/MaterioSapiSearchForm.php

@@ -45,14 +45,24 @@ class MaterioSapiSearchForm extends FormBase {
         "v-model" => "autocomplete"
       ],
     ];
-    $form['submit'] = [
-      '#type' => 'submit',
-      '#value' => $this->t('Search'),
-      '#attributes' => [
-        '@click.prevent' => "submit",
-      ]
-    ];
-
+    // $form['submit'] = [
+    //   '#type' => 'submit',
+    //   '#value' => $this->t('Search'),
+    //   '#attributes' => [
+    //     '@click.prevent' => "submit",
+    //   ]
+    // ];
+    $form['submit'] = array(
+        '#type'   => 'button',
+        // '#src'    => '',//drupal_get_path('module', 'materio_search_api') . '/images/search.png',
+        '#value'  => t('Search'),
+        // '#prefix' => '<div class="search-btn-wrapper">',
+        // '#suffix'=> '</div>',
+        '#attributes' => [
+          'title' => t('Search'),
+          '@click.prevent' => "submit",
+        ]
+      );
     return $form;
   }