Easy copy and paste of checkboxes

[andrew mccall]

When working in the ckeditor, you used to be able insert a check box in one area and then click on top of the check box (you did not have to highlight it) and copy and paste it. You can no longer do that.

If you click on top of the check box and copy it with the context menu, it just pates a space (no check box).

If you very tediously highlight the check box and copy it, it includes a space before the check box and a space after the check box.

[Jakub Ś]

Problem can be reproduced in Blink and Webkit browsers from CKEditor 4.4.7.

Please note that selection or form elements handling, in other browsers, isn't perfect as well: #12465, #5804, #12074, #12895.