*SEO Metatag Info Plugin in the standard distribution*
- includes all languages FlatPress currently supports as standard (translation via Deepl).
- Content customized texts incl. placeholder as example.
- With own hook in entry- and statictemplate, because otherwise the tag plugin is also shown when creating static pages; which is not supposed to be
Updated calls to current Smarty API (register_function()/register_modifier()/register_block() -> registerPlugin(); assign_by_ref() -> assignByRef()).
Fixed file includes in templates with quotes.
Removed SmartyValidate.class.php includes.
Still work in progress as some errors still appear!
Noticed that when editing an entry, the categories checkbox container's
name was 'Archive'. I modified the template and the lang file so that
it's 'Categories' from now on.