An alleged photo leak of iPhone 5S components on Chinese site Weibo provides further evidence that Apple is planning a gold color option for the device. A SIM tray, volume control, mute switch, and power button — reportedly for the iPhone 5S — are pictured, all in the same gold tone. Despite the fact that Apple famously released and quickly discontinued a gold-colored iPod mini due to weak demand—the only color it removed from that device’s…