When a ticker is added by a Gutenberg block, it is initially empty. This can be detected by checking the "last" flag for 0 value. If found, the ticker is now updated immediately by the AJAX function and not waiting for the poll interval to trigger.
* implement react-based JS block * refactor shortcode and widget to use the same syntax and classes
ES5 support is still present to not introduce breaking changes (dropped IE10 support) in minor updates.
Due to naming conflicts with the original wp-liveticker plugin this one is now renamed to a unique identifier.