Updated CovertToEnergy interface to use Workspace Selector.

Removed the combo box implementation and refresh button.

Refs #5590
Updating validation for CtoE interface.

Refs #5590
Chnaged C2E SofQ tab and IDA interface to use workspace selectors.

Refs #5590
Miss spelt name of Qt widget.

Refs #5590
Fixed merge conflict with another branch I was working on.

Merge commit '184fc6adecdf01bad218c036783e035970f7c9fe' into feature/5590_IDA_support_workspace_refresh

Conflicts:
	Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/IndirectDataAnalysis.ui

Refs #5590
Merge branch 'feature/5590_IDA_support_workspace_refresh' into develop