Fix poster list keys

src/public/js/components/list/posters.js

@@ -138,15 +138,15 @@ class Posters extends React.PureComponent {
             if ((index % 2) === 0) { clearFixes.push("clearfix visible-sm") };
 
             return (
-              <div>
+              <div key={imdbId}>
                 {clearFixes.length > 0 && clearFixes.map(function(el, i) {
                   return (
-                    <div key={`${imdbId}-${i}`} className={el}></div>
+                    <div key={`clearfix-${imdbId}-${i}`} className={el}></div>
                   );
                 })}
                 <Poster
                   data={movie}
-                  key={imdbId}
+                  key={`poster-${imdbId}`}
                   selected={selected}
                   onClick={() => this.props.onClick(imdbId)}
                 />