GUI: Add option to remove starting directory in length in path length calulations

[TheMaskedOnion]

Would it be possible to add an extra option in the GUI to remove the starting directory length from the reported length?

e.g. Len(%ReportedPath%) - Len(%StartingDirectory%)

Currently this can be done by ticking the "Replace the starting directory in the returned path with" and leaving it empty but this will break the ability to right click on the reported path and open in file explorer.