* NEW WP 5.1 compatibility
* NEW German language updated by WP Translations
* NEW Select a primary category for post permalink
* NEW WooCommerce dynamic variables for title / meta desc: price with taxes (%%wc_single_price%%), price without taxes (%%wc_single_price_exc_tax%%)
* INFO Better URL encoding for canonical / dc.relation / dc.source / og.url
* INFO Add is_wp_error checks for custom taxonomy in title tag
* FIX Canonical URL for old permalink
* FIX redirects with + sign
* FIX CSS in Tools blocking buttons
* FIX og:image:alt esc_attr