links in aside panel made look more prettier

hw18-react-store/src/App.scss

@@ -77,9 +77,11 @@ li {
 }
 
 .CatLink {
-  border: 1px solid black;
   padding: 3px;
   margin: 10px 0px;
+  border-left: 5px solid rgb(47, 121, 170);
+  //border-right: 5px solid rgb(47, 121, 170);
+  background-color: whitesmoke;
   &:hover {
     background-color: black;
     a {