Change Details

Did a search for "images/background.png" and found no other occurences. Then did a search for "background.png" and found that we are actually using this image in `sanitization.js` to replace image URLs in the "sanitization process." So I renamed `background.png` to `placeholder.png` so it could still be used for that.

Did a search for "images/background.png" and found no other occurences. Then did a search for "background.png" and found that we were actually using it in `sanitization.js` to replace image URLs as part of the "sanitization process." So I renamed `background.png` to `placeholder.png` and left the file in.

Did a search for "images/background.png" and found no other occurences. Then did a search for "background.png" and found that we awere actually using this imageit in `sanitization.js` to replace image URLs inas part of the "sanitization process." So I renamed `background.png` to `placeholder.png` so it could still be used for thatand left the file in.