I'd like a command to open up the folder of whatever file I'm looking at. It would be similar to Open Project Folder, only instead of opening the root folder for the whole project it would open the folder of whatever map, icon, or other file I happen to have open at the moment.

In addition to adding this command to the file menu it would also be nice to have it in the context menu for the file tree, it would be right next to delete and rename.