Allow change of image when link to Direct page is shared/change source of image

At present, when the link is shared (on social media, for example) the preview image is of the page logo. This is not the optimal image to use, as it doesn't (always) show the property itself. It tends to be a company logo. Either provide hosts with a way to specify a particular picture, or import this picture from the gallery of images (the lead picture, for example)