Issue #65: Using RecordSelect on ProfessorResearchArea to allow a better design of ResearchArea selection on Professor. Also adding validation for ProfessorResearchArea fields
Issue #65: Using RecordSelect on ProfessorResearchArea to allow a better design of Professor selection on ResearchArea. Changed validation message
Issue #65: Probably fixing error of not showing field. Passing validation test
Issue #65: Using RecordSelect for adding major to students and students to majors. Reafactoring Models to use has_many :through
Issue #65: Using RecordSelect. And trying to fix columns disappearing