Checks if the current user belong to a given site.

Determines whether the query is the main query.

Handles uploading an audio file.

Handles uploading a generic file.

Handles uploading an image.

Displays the checkbox to scale images.

Used to display a “After a file has been uploaded.

Handles uploading a video file.

Determines if a meta field with the given key exists for the given object ID.

Display relational link for parent item