Started new branch for a screen to find the ID of a user if they forgot
their name. Made starting design on screen
Added findUser to ExcelManager, returns the id of the user given the first
name and last name
Added button to main screen to link to ForgotIDScreen
Fixed findUser closing workbook before getting id
If user forgets ID, this screen now allows them to fetch it using their
first and last name
Made final changes to ForgotIDScreen, finshed with it now