They said a fix is in the next cleint release, by the end of the year. Searched for and wide! I think you can change the background by messing with the Web Client files on your Connection Server.
https://www.definetomorrow.co.uk/blog/2017/5/12/brand-the-vmware-view-landing-page-part-2-1
We are about to try this. Let me know if it works, Are you messsing with the JSON configuration files at all? Wondering if I can skip the SSL trust.