fix install text overflow (bug 672634)

media/css/impala/listing.less

@@ -135,7 +135,9 @@ header .feed {
         min-width: 190px;
         padding: 0 10px;
         visibility: hidden;
-        white-space: nowrap;
+        p {
+            margin: 0;
+        }
         .install-note {
             text-align: left;
         }