Handle working alone scenario

Author: ajitsing

lib/pairing_matrix/server/public/matrix.js

@@ -123,9 +123,13 @@ function PlayGround(selector) {
   };
 
   this.mouseOver = function (id) {
-    hideMatrix();
     var connectedPairs = _.unique(_.flatten(playground.getAllPairsContaining(id)));
-    console.log(connectedPairs);
+    hideMatrix();
+    if (connectedPairs.length == 0) {
+      showPlayer(id);
+      return;
+    }
+    
     connectedPairs.forEach(function (pair) {
       showPlayer(pair);
     });