Makes the builder’s custom select popovers (the preview picker, the responsive-strategy select, the element HTML-tag select and others) usable with a screen reader and the keyboard: proper combobox / listbox / option roles, one Tab stop, and arrow keys to move through the options with Enter to choose. Purely additive — typing to filter and clicking to choose are left to Builderius.
Editing
Accessible select comboboxes
Keyboard and screen-reader support for the custom selects.