This commit adds an "Extract to subdirectory" option to
the extract dialog which allows the user to extract the
contents of the archive to a directory with the name of
the archive (without the extension.) The user will be
prompted if the directory must be created.
file-utils.c: Improve remove_extension_from_path
Rework this function so that it correctly parses and
truncates files with multiple extensions like .tar.gz
file-utils.c: Improve get_file_extension
Improve this function to correctly identify and return
supported compressed tar file extensions