Code refactoring (es5 -> es2015)

dev/Model/Identity.jsx

@@ -0,0 +1,42 @@
+
+import ko from 'ko';
+
+import {AbstractModel} from 'Knoin/AbstractModel';
+
+class IdentityModel extends AbstractModel
+{
+	/**
+	 * @param {string} id
+	 * @param {string} email
+	 */
+	constructor(id, email)
+	{
+		super('IdentityModel');
+
+		this.id = ko.observable(id || '');
+		this.email = ko.observable(email);
+		this.name = ko.observable('');
+
+		this.replyTo = ko.observable('');
+		this.bcc = ko.observable('');
+
+		this.signature = ko.observable('');
+		this.signatureInsertBefore = ko.observable(false);
+
+		this.deleteAccess = ko.observable(false);
+		this.canBeDeleted = ko.computed(() => '' !== this.id());
+	}
+
+	/**
+	 * @returns {string}
+	 */
+	formattedName() {
+		const
+			name = this.name(),
+			email = this.email();
+
+		return '' !== name ? name + ' (' + email + ')' : email;
+	}
+}
+
+export {IdentityModel, IdentityModel as default};