Extract TopBar to a component / improve style

src/components/TopBar.js

@@ -0,0 +1,25 @@
+import React from 'react';
+
+import { Header, Navbar, Nav, Icon } from 'rsuite';
+
+const headerStyle = {
+	borderRadius: '7px 7px 0 0',
+};
+
+function TopBar() {
+	return (
+		<Header >
+			<Navbar appearance='inverse' style={headerStyle}>
+				<Navbar.Body>
+					<Nav pullRight>
+						<Nav.Item
+							icon={<Icon size='2x' icon='user-circle' />}
+						></Nav.Item>
+					</Nav>
+				</Navbar.Body>
+			</Navbar>
+		</Header>
+	);
+}
+
+export default TopBar;