Fixed slider render issue

Closes #3422384

drupal8_custom_theme.theme

@@ -128,24 +128,38 @@ function drupal8_custom_theme_preprocess_menu(&$variables, $hook) {
  */
 function drupal8_custom_theme_get_slider_content() {
   $slider_content = array();
+  $slide_counter = 0;
   for ($i = 1; $i <= theme_get_setting('no_of_slides'); $i++) {
+    $slider = false;
     $fid = theme_get_setting('slide_image_path'.$i,'drupal8_custom_theme');
     if (!empty($fid)) {
       $file = File::load($fid[0]);
       $uri = $file->getFileUri();
       $path = \Drupal::service('file_url_generator')->generateAbsoluteString($uri);
+      $slider = true;
     }
     else {
-      $path = base_path() . \Drupal::service('extension.list.theme')->getPath('drupal8_custom_theme') . theme_get_setting('slide_image_path_' . $i, 'drupal8_custom_theme');
+      if(!empty(theme_get_setting('slide_title_' . $i, 'drupal8_custom_theme')) || !empty(theme_get_setting('slide_description_' . $i,      'drupal8_custom_theme')) || !empty(theme_get_setting('slide_url_' . $i, 'drupal8_custom_theme')))
+      {
+        $path = base_path() . \Drupal::service('extension.list.theme')->getPath('drupal8_custom_theme') . theme_get_setting('slide_image_path_1', 'drupal8_custom_theme');
+        $slider = true;
+      }
+    }
+    if($slider){
+      $addclass = "";
+      $slide_counter ++;
+      if(!theme_get_setting('slide_title_' . $slide_counter, 'drupal8_custom_theme')){
+        $addclass = "title-empty";
+      }
+      $slider_content[$slide_counter] = '<li>
+        <img src="' . $path . '" alt="Slider Banner" />
+        <div class="flex-caption">
+          <h2 class="slider-title '.$addclass.'">' . theme_get_setting('slide_title_' . $slide_counter, 'drupal8_custom_theme').'</h2>
+          <p class="flex-description">' . theme_get_setting('slide_description_' . $slide_counter, 'drupal8_custom_theme').'</p>
+          <a href="' . theme_get_setting('slide_url_' . $slide_counter, 'drupal8_custom_theme') . '" class="more-link">Read more</a>
+        </div>
+      </li>';
     }
-    $slider_content[$i] = '<li>
-      <img src="' . $path . '" alt="Slider Banner" />
-      <div class="flex-caption">
-        <h2>' . theme_get_setting('slide_title_' . $i, 'drupal8_custom_theme').'</h2>
-        <p class="flex-description">' . theme_get_setting('slide_description_' . $i, 'drupal8_custom_theme').'</p>
-        <a href=' . theme_get_setting('slide_url_' . $i, 'drupal8_custom_theme') . ' class="more-link">Read more</a>
-      </div>
-    </li>';
   }
   return $slider_content;
 }