Determines whether an eyedropper icon should be drawn for all Object reference fields.
The eyedropper tool can be used to select Object by clicking at them in the scene view, hierarchy view, project view or inside Power Inspector.
An icon for activating the eyedropper tool is drawn on Object reference fields.
An icon for activating the eyedropper tool is not drawn on Object reference fields. It can still be activated by either right-clicking the object picker icon, or from the context menu for the Object reference field.