Load additional icons from HTML

When a Web App Manifest is found and loaded, we still want to check HTML
for some additional icons that are usually not added to manifests.

lib/manifique/web_client.rb

@@ -18,6 +18,8 @@ module Manifique
 
       if manifest = fetch_web_manifest
         @metadata.load_from_web_manifest(manifest)
+        parse_apple_touch_icons_from_html
+        parse_mask_icon_from_html
       else
         parse_metadata_from_html
       end