* ADD: rel and target controls to Dynamic Image link;
* ADD: allow to add meta boxes only for specific posts/pages;
* FIX: Checkbox meta fields processing.
* FIX: Allow to use HTML tags in textarea meta field;
* ADD: Calendar widget;
* ADD: Posts relationships;
* ADD: Columns gap for Listing Grid widget;
* ADD: 'QR Code' callback to filter Dynamic Field output;
* ADD: 'Format number' callback to filter Dynamic Field output;
* ADD: Date query controls for Posts query settings in Listing Grid widget;
* FIX: Dynamic image tag.
* ADD: 'Embed icon' callback for Filter field output option in Dynamic field widget;
* ADD: %current_terms% and %current_meta% macros;
* UPD: Allow to use shortcodes inside Field format control in Dynamic field widget;
* FIX: Prevent JavaScript errors in some cases;
* FIX: Correctly enqueue assets for multiple meta boxes on page.
