Open Repository: ask for new repository location, when it is missing

I frequently move git repositories from one location to another (externally as from the file manager), and Smartgit is not helpful because every time I try to open Smartgit just says the repository is missing. This is quite troublesome because I have to ask for Smartgit to remove it, and then, add it back (on the same group and with the same name, because I often rename them).

When Smartgit asks me the question: `Do you want to remove the missing repository '..'.?`, it could add an option to select a new location for the repository, so, I can keep its name and group (on Smartgit repositories view).