Added isAllFieldsFilled property and a checkAllFieldsFilled function to the SignupState and LoginState classes to make sure the app can check if all the required fields are completed.
Added a section to check if isAllFieldsFilled and isValid are true => have the login button / signup button as "blue"/primary color, else, by default it is grey.
Updated the logic to have the button activated only when isAllFieldsFilled and isValid are true.
Fixed isValid bug
Updated thepassword and confirm password logic to build when either of them change.
Issue #90
isAllFieldsFilledproperty and acheckAllFieldsFilledfunction to theSignupStateandLoginStateclasses to make sure the app can check if all the required fields are completed.isAllFieldsFilledandisValidare true => have the login button / signup button as "blue"/primary color, else, by default it is grey.isAllFieldsFilledandisValidare true.isValidbugpasswordandconfirm passwordlogic to build when either of them change.