YITH WooCommerce Product Countdown Premium 1.37.0

• Fix: minified JS files not updated

• New: set the time for start and end date of the countdown
• New: integration with YITH Pre-Order for WooCommerce Premium
• Tweak: shortcode loop template overwritable from theme

Fix: countdown with WPML active
Fix: expired products visibile on shortcodes
Fix: sold quantity update for variable products
Fix: topbar styling
Tweak: added "ywpc_override_standard_position_loop" filter