Remember checkbox (#1075)

* Add session option to Rememberer class

* Update session login function to allow send additional data

* Add Remember me checkbox

* Cleanup login modal

js/forum/src/components/SignUpModal.js

@@ -116,7 +116,7 @@ export default class SignUpModal extends Modal {
    */
   logIn() {
     const props = {
-      email: this.email() || this.username(),
+      identification: this.email() || this.username(),
       password: this.password()
     };