Consider IUTF_RestoreTracing after instrumented run as default

[MichaelHuth]

Usually after generating the cobertura files the user needs the original source to generate correct reports with e.g. ReportGenerator.

Thus, I think it would be more convenient if after an instrumented run the procedure files are automatically restored with IUTF_RestoreTracing. We can still consider an option to not do that for debugging purposes.

[t-b]

Looks like a popular request, see #429.