Current layout:
In case of a document which has an image (at leas type document type Image (or overriding from it) ) the layout of selected images should be like this:
In case of a document type Image (or overriding from it) the image should be added in the drop down, on the left of the title, in the same size as in the screenshot above
asset config "integrated_js" should not contain an other version of select2 (for example @AppBundle/Resources/public/js/select2.js)