Bugfix: File transfer progress should not stay on zero if exception occurs

Should fix mantis issue 4135
Merge branch 'rc/2.0.0' into develop

Conflicts:
	CmisSync/TestLibrary/Makefile.am
	CmisSync/TestLibrary/TestLibrary.csproj
Merge branch 'develop' into feature/SelectiveIgnore

Conflicts:
	CmisSync/TestLibrary/Makefile.am
	CmisSync/TestLibrary/TestLibrary.csproj