Requirements: the Streetview panel is open and the place layer is on

Then: allow creating a box on the Streetview panel. When a box is drawn add a bar saying: now select a place to apply this picture.
Add an X on the box to delete it. Allow the user to resize the box.
Set a minimum size and a fixed ratio (the one used by the client) for a decent resolution.
Drawing a new box removes the previous one if present.

If then the user clicks on a place, ask him:

"would you like to set this selection as a place picture"?
Yes/Cancel

The picture data is taken directly from Google and you'd have the direction of the shot too.

by bedo2991
Link to the original suggestion: https://www.waze.com/forum/viewtopic.php?f=1525&t=293006