multiple Practice session images

after more than a year of asking for us to be able to show an image whilst in pracrice session on webinars (when it was a part of classic), we need a bit more flexibility than has been implemented.

whilst the process looks nice, being able to see a preview etc., it is also extremely limiting. in events classic, you could upload during the call and be able to show multiple images - i.e. a welcome screen before you go live, and a thank you for joining screen at the end of the call.

please add the ability to choose multiple images, or be able to add something mid-call.