Sign in & sign up messages corrected (#2049)

Author: JMach1

src/components/users/signin/ko/runtime/signin.ts

@@ -53,7 +53,7 @@ export class Signin {
             decorateInputElement: true
         });
 
-        this.username.extend(<any>{ required: { message: ValidationMessages.firstNameRequired }, email: true });
+        this.username.extend(<any>{ required: { message: ValidationMessages.emailRequired }, email: true });
         this.password.extend(<any>{ required: { message: ValidationMessages.passwordRequired } });
         this.consented.extend(<any>{ equal: { params: true, message: ValidationMessages.consentRequired } });
     }

src/components/users/validationMessages.ts

@@ -3,7 +3,7 @@ export class ValidationMessages {
     static emailRequired = `Email is required.`;
     static captchaRequired = `Captcha is required.`;
     static firstNameRequired = `First name is required.`;
-    static lastNameRequired = `First name is required.`;
+    static lastNameRequired = `Last name is required.`;
     static passwordRequired = `Password is required.`;
     static passwordConfirmationMustMatch = `Password confirmation field must be equal to password.`;
     static newPasswordRequired = `New password is required.`;