When making a different signature, if I add an image to the identity it can be saved, but then when I want to send an email I cannot select a different identity. Is there some size limit? There is very clear instructions to go to the IMAP page and edit the identities. And I can add an image, but the result significantly limits the use of multiple identities. If i remove the image files everything works again. But add even a single image file to any single identity and I can no longer select different identities.