fix constraint adding conflict for max courses and computer preference
add conflict detection for max_courses constraints
Fix view constraints toggle bug
Remove color toggle on view constraints button
Fix toolTips button hover bug
Sort room selection options
Merge branch 'develop' of https://github.com/donnell74/CSC-450-Scheduler into fix_conflict_detection
resolve issues with displaying and deleting constraints
Merge pull request #64 from donnell74/fix_view_constraints_toggle

Fix view constraints toggle bug
Merge pull request #63 from donnell74/fix_conflict_detection

Fix conflict detection for max_courses/computer_preference, and issues with constraint deletion
merges develop into fix_display_none