Fix annoying meaningless page titles in the WordPress post editor. Very helpful if you have to edit multiple posts at once and dont want to lose track.

fix-admin-page-title.php

add_filter( 'admin_title',  'fix_admin_page_title' , 10, 2 );

function fix_admin_page_title( $admin_title, $title ) {
	global $post, $title, $action, $current_screen;
	$return = $admin_title;
	
	if( isset( $current_screen->post_type ) && $action == 'edit' ) {
		//$return = $post->post_title . ' (' . $post->ID . ') - ' . get_bloginfo('name');
		
		$return = $post->post_title . ' (' . $post->ID . ') - ' . $admin_title;
	}
	
	return $return;  
}