I often move a file on filesystem-basis and get a "missing" and a "untracked" file in SourceTree. To commit this moved file correctly, I'll have to undo the move-operation in Finder and use the "Move..."-feature in SourceTree.

It would be great to have a feature "Moved file..." in the context-menu of a untracked file, that will show up a dialog to choose the previous location of the file, so that Hg will then correctly show my move-operation even if I didn't move it in SourceTree, but with Finder.
(Vice versa: Select new location of a missing file would be great, too.)

(see attached screenshot)