* UPD: replaced deprecated method _register_controls to register_controls
* FIX: CheckBoxes additional settings dropdown
* FIX: Search filter spinner spins infinitely on submission with 'AJAX on typing'
* FIX: ePro widgets after filtration
* FIX: duplication of sublevels of a hierarchical select
* FIX: woocommerce shortcode attribute on page reload
* FIX: check hierarchy current page
* FIX: Radio filter with motion effects sticky
* FIX: Date range filter query & placeholder on redirect
* FIX: Date period filter for popup
* FIX: Select filter alignment style
* FIX: EPro Posts skin 'Full Content' settings