'Show Blocks' do not recover after 'Source' view

[Roman]

Hi Team,

How reproduce:

1. Go to ​http://ckeditor.com/demo#full (version 4.1)
   
2. Click on 'Show Bloks', blocks appear
   
3. Click on 'Source'
   
4. Click on 'Show Bloks', blocks do not appear, but button stay pushed down.
   

Thanks!

[Roman]

Update.

Looks like problem is here ​http://dev.ckeditor.com/browser/CKEditor/trunk/_source/plugins/showblocks/plugin.js#L139

command.state equal to by somehow CKEDITOR.TRISTATE_DISABLED

 command.state != CKEDITOR.TRISTATE_DISABLED

135                        // Refresh the command on setData.
136	                        editor.on( 'mode', function()
137	                                {
138	                                        if ( command.state != CKEDITOR.TRISTATE_DISABLED )
139	                                                command.refresh( editor );
140	                                });

Test: I added this into custom plugin

            editor.on( 'mode', function() {
                var command = editor.commands.showblocks;

                console.log("command.state = " + command.state, "CKEDITOR.TRISTATE_DISABLED = " + CKEDITOR.TRISTATE_DISABLED);

                if ( command.state != CKEDITOR.TRISTATE_DISABLED ) {
                    command.refresh( editor );
                }
            });

Then I did:

1. Add to config config.startupOutlineBlocks = true
2. Refresh the page | command.state = 1, CKEDITOR.TRISTATE_DISABLED = 0
3. Click on 'Source' | command.state = 1, CKEDITOR.TRISTATE_DISABLED = 0
4. Click on again 'Source' | command.state = 0, CKEDITOR.TRISTATE_DISABLD = 0
5. In console CKEDITOR.instances.body.commands.showblocks.state is equal 1

I created wired fix for myself for now, maybe it could be helpful somebody -)

            editor.on('mode', function( evt ) {
                /**
                 * Temporary fix
                 * Issue: http://dev.ckeditor.com/ticket/10268
                 */
                editor.commands.showblocks.refresh( editor );
            });

[Jakub Ś]

Problem can be reproduced in all browsers from CKEditor 4.1.

[Piotrek Koszuliński]

Fixed by #10249.