Fixed react error when displaying a series search result for an existing series

frontend/src/AddSeries/AddNewSeries/AddNewSeriesSearchResult.css

@@ -1,10 +1,15 @@
 .searchResult {
-  display: flex;
+  position: relative;
   margin: 20px 0;
   padding: 20px;
   width: 100%;
-  background-color: $white;
   color: inherit;
+}
+
+.underlay {
+  @add-mixin cover;
+
+  background-color: $white;
   transition: background 500ms;
 
   &:hover {
@@ -14,6 +19,13 @@
   }
 }
 
+.overlay {
+  @add-mixin linkOverlay;
+
+  position: relative;
+  display: flex;
+}
+
 .poster {
   flex: 0 0 170px;
   margin-right: 20px;

frontend/src/AddSeries/AddNewSeries/AddNewSeriesSearchResult.js

@@ -77,11 +77,13 @@ class AddNewSeriesSearchResult extends Component {
     }
 
     return (
-      <div>
+      <div className={styles.searchResult}>
         <Link
-          className={styles.searchResult}
+          className={styles.underlay}
           {...linkProps}
-        >
+        />
+
+        <div className={styles.overlay}>
           {
             isSmallScreen ?
               null :
@@ -169,7 +171,7 @@ class AddNewSeriesSearchResult extends Component {
               {overview}
             </div>
           </div>
-        </Link>
+        </div>
 
         <AddNewSeriesModal
           isOpen={isNewAddSeriesModalOpen && !isExistingSeries}