Giving the fact that the new class .block-editor-block-listblock has been added in WordPress 5.4 we're going to update the new selector to use this new class and keep the old one .editor-block-listblock for users that are still using a WordPress version older than 5.4.
Related to https://github.com/pixelgrade/customify/issues/227
Giving the fact that the new class .block-editor-block-listblock has been added in WordPress 5.4 we're going to update the new selector to use this new class and keep the old one .editor-block-listblock for users that are still using a WordPress version older than 5.4.