Ticket #3437: 3437.patch

_source/plugins/showblocks/plugin.js

@@ -128 +128 @@
                                 if ( this._.showBlocks )
                                         command.exec();
                         } );
+                        
+                        // Preserve show block state when switching cross modes.
+                        editor.on( 'mode', function(){
+                                if( editor.mode === 'wysiwyg' )
+                                        command.setState( this._.showBlocks ? CKEDITOR.TRISTATE_ON : CKEDITOR.TRISTATE_OFF );
+                        } );
                 }
         });
 } )();