Use block-grid to display backups sets

baas/activity.html

@@ -45,7 +45,7 @@
                     $("#backup-alert").show();
                 }
                 var ul = $("<ul></ul>")
-                    .attr("class", "no-bullet")
+                    .attr("class", "small-block-grid-4")
                     .attr("id", "backup_list");
                 $.each(backups, function(i, backup) {
                     var li = $("<li></li>")

baas/static/stylesheets/custom.css

@@ -45,11 +45,8 @@
 .backup-box {
     border: 1px dotted #6e6e6e;
     border-radius: 4px;
-    width: 180px;
-    height: 170px;
+    min-height: 170px;
     margin: 5px;
-    padding: 5px;
-    display: inline-block;
     font-size: 14px;
 }
 .selected-bar {