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Andy Hertzfeld authored
added an up arrow on the property browser title bar to act as an affordance for go back; also, made add background check the mime type of the file selection and only add it if it's an image
edaa71b1
added an up arrow on the property browser title bar to act as an affordance for go back; also, made add background check the mime type of the file selection and only add it if it's an image