Refs #10483 Fix coverity issue(s) in ReflMainViewPresenter
Refs #10483 Remove superfluous null pointer checks

`m_view` will always be a valid pointer as it's assigned and dereferenced
in the constructor, and never altered afterwards.
Merge remote-tracking branch 'origin/feature/10483_refl_coverity_issues'
Refs #10438. Added checGroups to IAlgorithm.
Refs #10438. Don't validateInputs for WorkspaceGroups in gui.
Merge remote-tracking branch 'origin/master' into bugfix/10438_validate_group_ws