Trash button on map editor item description window

Not sure what's it's called, but when you click on an item, the pop-up window you see with descriptions, buttons ("shuffle model"), and inputs ("water source strength"). Having a trash button like that found on the building pop-ups would let the map maker delete an already highlighted item without needing to use the "Delete object" button in the icon bar. This is useful when editing a cluster of ruins or trees, because it's really easy to lose track of the object when looking away to the icon bar, then looking back to find your object is no longer highlighted.

Not a very impactful change, but should be easy to make since the functionality already exists for buildings.