Allow regex to be performed on _Defined In_

[lsh246]

Azure uses the following format for its code:

https://dev.azure.com/some/project/_git/repoName?version=GBdev&path=%2Fpath%2Fto%2Ffile%2Ffoo.js

It escapes the slashes in the actual path to the file - instead of slash it uses %2F.

It would be nice if we could perform a regex search/replace on the Defined In URLs so that we could fix the path before appending it to the prefix.