mai_site_layout() gets wrong result on single posts when Mai Post Grid is used on the page.

[JiveDig]

This took forever to find and is related to this commit a570d01, though it turns out that isn't a solid fix.

The issue is actually caused by mai_get_image_src_srcset_sizes calling wp_calculate_image_sizes during the preload of featured/logo/images.

So far, it looks like calling get_queried_object_id() makes sure we get the actual single post ID and not the ID from inside the loop in Mai Post Grid.