Update Bookstore CSS styles

Signed-off-by: Pekka Helenius <fincer89@hotmail.com>

bookstore/src/main/resources/static/css/bookstore.css

@@ -12,4 +12,15 @@
 .apiref-table-title {
 	background-color: #48C;
 	color: #FFF;
+}
+
+#bookstore-topform-base {
+	display: flex;
+	flex-direction: row;
+	justify-content: space-between;
+}
+
+#bookstore-loginout {
+	text-align: right;
+	margin: 0.5em 2em;
 }