Descriptive Problem Summary: When using the Map Editor, attempting to use the Eraser tool to remove objs or mobs from the map fails to delete targets.

Numbered Steps to Reproduce Problem:
1) Load a project with objs or mobs on the map.
2) Select an obj/mob using the Picker tool, or select them from the instance palette.
3) Select the Eraser tool.
4) Attempt to remove the target obj/mob by click/dragging along the map at it's location. Observe that the target is not removed.

Expected Results: For the selected instance of objs/mobs to be removed from the map when following the above steps.

Actual Results: Objs and mobs are not removed from the map using the Eraser tool.

Does the problem occur:
Every time? Or how often? Every time.

When does the problem NOT occur? The issue does not occur when working with turfs.

Workarounds: Right click the target and select delete from the menu.