Version 5.0.0 beta 5

applications/core/modules/front/system/widgets.php

@@ -109,11 +109,18 @@ class widgets extends Controller
 
 			foreach( $application->getAvailableWidgets() as $block )
 			{
+				/* @var Widget $block */
 				if ( !$block->isExecutableByApp( array( $this->pageApp, Area::AREA_SIDEBAR ) ) )
 				{
 					continue;
 				}
 
+				/* Is this widget hidden from the block list? */
+				if( !$block::$showInBlockList )
+				{
+					continue;
+				}
+
 				if ( in_array( $block->key, $favoriteIds ) )
 				{
 					$favorites[$block->key] = $block;