When an item enters a state of error, a red icon in the error section appears. When hovering over it, it displays a tooltip with the error message. Upon clicking it, the tooltip "solidifies" as a window, thus it doesn't disappear when the mouse pointer moves away from the icon.
Currently, this tooltip window has a single button/link - for closing the tooltip. It would be convenient if a 'Copy' button/link would be added to send the error message straight to the copy buffer.