Better BCA GPA

Adds several very useful features to PowerSchool. The GPA feature is finally here! Please submit all your feedback to this form: https://forms.gle/69qtRqJASghZQyhU7 In this current version, the following features are available: - Add imaginary grades and see how your final grade for a class would change. - See an ACCURATE version of your GPA and see how different class grades would affect your GPA - See accurate point values for all your class grades, down to the 4th decimal place - Stylize the PowerSchool page to make it look better - Quality of life PowerSchool changes - Bug fixes All features work for all classes, including classes using category weighting.