Merge remote-tracking branch 'origin/feature/9614_documentation_check'

Re #9614.

Conflicts:
	Code/Mantid/docs/source/algorithms/GetEi-v2.rst
Refs #9641 - Clear away PropertyManagers.
Merge branch 'bugfix/9641_clear_prop_man_data_service' into develop

Conflicts:
	Code/Mantid/docs/source/algorithms/GetEi-v2.rst

Looks like we've had a conflict here before, caused by a slight difference
in indentation in GetEi-v2.rst.  Hopefully I've picked the right one to
avoid people further conflicts.  Refs #9587.