Resolve "PathManager messes with filename extensions"

Release notes

Details

pathmanager was implicitly removing file name extensions in the localFilePath due to hashing of the original file path recently introduced (after last tag, hence, no release notes as after this fix there should not be any difference w.r.t. the previous tag). Now, the last '.' and everything after is stored away before the hashing and then re-appended.

Closes #175 (closed)