Add styles for the newsletter checkbox.

services/web/public/stylesheets/app/login-register.less

@@ -91,6 +91,16 @@
 			cursor: pointer;
 		}
 
+		.login-register-newsletter {
+			font-size: 90%;
+			margin: @line-height-computed -(2 * @line-height-computed) 0;
+			text-align: left;
+
+			& > .checkbox {
+				margin-bottom: 0;
+			}
+		}
+
 		.login-btn-ieee {
 			.make-login-register-brand-btn(@brand-ieee-color);
 		}