refs #4877 Added save and plot option.

Save option in CalcCorr and ApplyCorr. Improved the drop-down menu in ApplyCorr.
refs #4877 Improved GUI options

'Plot Output' drop-down menu now complete and added an option to 'Plot Contributions'
refs #4877 Added option to scale container
refs #4877 Changed tabs into spaces
Merge branch 'feature/4877_indirect_apply_corr' into develop Refs #4877

Conflicts:
	Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/IndirectDataAnalysis.ui
	Code/Mantid/MantidQt/CustomInterfaces/src/ApplyCorr.cpp
	Code/Mantid/MantidQt/CustomInterfaces/src/CalcCorr.cpp
	Code/Mantid/scripts/Inelastic/IndirectAbsCor.py