Incorrect PHPDoc for get_current_screen

[markauk]

The PHPDoc documentation for get_current_screen doesn't properly define the type of object which is returned. It should be:-

* @return object WP_Screen

Patch attached.

Obviously this doesn't make any difference to the running of the code, but will make life easier for anyone with IDE's which parse PHPDoc comments.

[duck_]

Since we can name the specific class it could be:

@return WP_Screen Current screen object

[markauk]

Yes! I was being unnecessarily frugal with words...

Patch updated.

[nacin]

The point was that you can omit 'object' and simply use the actual object WP_Screen as the type designator.

[nacin]

In [19942]:

Use class name for @return. props markuak, fixes #20063.