Add 'from' and 'received at' to the email summary.

Really useful in deciding what to read.

src/EmailSummary.tsx

@@ -48,11 +48,16 @@ class EmailSummary extends React.Component<
 			this.props.mailbox.id +
 			"/" +
 			this.props.emailId;
+		const stub = this.props.emailStub;
 		return (
 			<div className="p-2 border" key={this.props.emailId}>
 				<a className="btn" href={href}>
-					{this.props.emailStub != null
-						? this.props.emailStub.subject
+					{stub != null
+						? stub.receivedAt +
+							" - " +
+							(stub.from == null ? "?" : stub.from[0].name) +
+							" - " +
+							stub.subject
 						: this.props.emailId}
 				</a>
 			</div>