Allow moderators to lock the meaning tree, variants, hyphenations and pronunciations
Prettier code for locking uneditable fields. HTML readonly works beautifully and select2 (mostly) obeys it.
Convert HTML4 attributes (checked="checked") to HTML5 ("checked").


git-svn-id: http://voronet.francu.com/repos/DEX@943 8d550267-2627-4c68-899f-85492a8dd5ca