Fix #10632: cannot update columns global defaults

The following error occured when an administrator tried to update the
global defaults for column display via manage_config_columns_page:

Application error #700: Project "0" not found.

This was caused by incorrectly validating the project ID for
ALL_PROJECTS.

manage_config_columns_set.php

@@ -57,7 +57,7 @@
 		access_ensure_project_level( VIEWER, $f_project_id );
 	}
 
-	if ( $f_update_columns_as_my_default ) {
+	if ( $f_update_columns_as_my_default || $f_update_columns_as_global_default ) {
 		$t_project_id = ALL_PROJECTS;
 	} else {
 		$t_project_id = $f_project_id;
@@ -110,4 +110,4 @@
 </div>
 
 <?php
-	html_page_bottom( __FILE__ );
+	html_page_bottom( __FILE__ );