use extra argument as uri for html dialog in browser mode (--uri parameter is preffered)

src/html.c

@@ -450,6 +450,8 @@ html_create_widget (GtkWidget * dlg)
       g_io_channel_set_flags (ch, G_IO_FLAG_NONBLOCK, NULL);
       g_io_add_watch (ch, G_IO_IN | G_IO_HUP, handle_stdin, NULL);
     }
+  else if (options.extra_data)
+    load_uri (options.extra_data);
 
   return sw;
 }