Change the default Social Share image for Feedback Forms

Please give us the ability to change the social share image that is shown when we share a feedback form link on social platforms or in FB Messenger. I think the Agency admin should have a way to set the default image used for all accounts, and our clients should have the ability to change that image to be their logo if they choose. Also, please give us a way to include guidance on the best image dimensions to use for social shares. Thanks.