Fixing a doxygen error.
Update DarwinSetup.cmake
Fixed trivial issues, mainly uninitialised members

Refs #10345
Fixed unchecked casts

Refs #10345
Merge branch 'bugfix/10345_coverity_issues_in_mantidqt' into develop

Conflicts:
	Code/Mantid/MantidQt/CustomInterfaces/src/JumpFit.cpp

Refs #10345