Show all users in assign filter when ALL PROJECTS is selected

Fixes #10130

Signed-off-by: Damien Regad <damien.regad@merckgroup.com>

core/filter_api.php

@@ -2218,7 +2218,7 @@ function filter_draw_selection_area2( $p_page_number, $p_for_screen = true, $p_e
 		$t_show_build = $t_show_product_version && ( config_get( 'enable_product_build' ) == ON );
 
 		# overload handler_id setting if user isn't supposed to see them (ref #6189)
-		if( !access_has_project_level( config_get( 'view_handler_threshold' ), $t_project_id ) ) {
+		if( !access_has_any_project( config_get( 'view_handler_threshold' ) ) ) {
 			$t_filter[FILTER_PROPERTY_HANDLER_ID] = array(
 				META_FILTER_ANY,
 			);

core/print_api.php

@@ -245,14 +245,33 @@ function print_captcha_input( $p_field_name ) {
 # @todo from print_reporter_option_list
 function print_user_option_list( $p_user_id, $p_project_id = null, $p_access = ANYBODY ) {
 	$t_users = array();
-
+	$t_users_temp = array();
 	if( null === $p_project_id ) {
 		$p_project_id = helper_get_current_project();
 	}
 
-	$t_users = project_get_all_user_rows( $p_project_id, $p_access );
+	if( $p_project_id === ALL_PROJECTS ) {
+		$t_projects = user_get_accessible_projects( auth_get_current_user_id() );
+		foreach( $t_projects as $t_project_id ){
+			$t_project_users_list = project_get_all_user_rows( $t_project_id, $p_access );
+			$t_users_temp = array_merge( $t_users_temp,$t_project_users_list );
+		}
+
+		$t_users_id_list = array();
+		# Remove current user from list (there is a "myself" value)
+		$t_users_id_list[] = auth_get_current_user_id();
+
+		# Deleting duplicate
+		foreach( $t_users_temp as $t_user ) {
+			if( !in_array($t_user['id'],$t_users_id_list ) ) {
+				$t_users_id_list[] = $t_user['id'];
+				$t_users[] = $t_user;
+			}
+		}
+	} else {
+		$t_users = project_get_all_user_rows( $p_project_id, $p_access );
+	}
 
-	# handles ALL_PROJECTS case
 
 	$t_display = array();
 	$t_sort = array();