QuickShow: Use new Bitmap::is_path_a_supported_image_format method

Author: https://github.com/asliturk
Commit: 3a903babee
Pull-request: https://github.com/SerenityOS/serenity/pull/2557
Reviewed-by: https://github.com/bugaevc

Applications/QuickShow/QSWidget.cpp

@@ -84,7 +84,7 @@ void QSWidget::navigate(Directions direction)
         Core::DirIterator iterator(current_dir, Core::DirIterator::Flags::SkipDots);
         while (iterator.has_next()) {
             String file = iterator.next_full_path();
-            if (!file.ends_with(".png") && !file.ends_with(".gif")) // TODO: Find a batter way to filter supported images.
+            if (!Gfx::Bitmap::is_path_a_supported_image_format(file))
                 continue;
             m_files_in_same_dir.append(file);
         }