Fixed category display, made add, delete, remove filter work [there is an error on delete still
Merge branch 'feature/Filters' of https://github.com/CS3733Team1/wpi-suite into feature/Filters
Merge branches 'dev' and 'dev' of https://github.com/CS3733Team1/wpi-suite into feature/Filters
took printing stuff out of DeleteFilterObserver's responseSuccess because Zach's change made it so there's no longer a message body that contains anything useful