Regarding the Leia thing... it's possible that they were created memories. I wonder how much of my childhood are legitimate memories and how much were created by my brain in response to photos I have seen and stories I've been told about events. It's possible that she created the image of her mother based on stories she heard and photos that she saw. No, Bail and his wife were not likely to have pictures of Padme around, but she was a Queen and a Senator so historical records would have her image in there somewhere along with rough accounts of her life. The rest could be Bail's description of her always being sad. Which she was a lot of the time when they were together because they watched together as the Republic crumbled and the galaxy fell into civil war.