Code review comment for lp:~widelands-dev/widelands/bug-1395322-tool3

If we're going to be so specific, we should also mention that Shift or Ctrl + Click removes map elements for Immovables, Animals and Port Space tools. Except Ctrl + Click with the Port Space tool does placement instead of removal for some reason. Perhaps we could fix this inconsistency? That would be an easy one-line change in EditorSetPortSpaceTool's constructor.

Also, see diff comments.