Let CSS determine which application row is last

app/assets/stylesheets/pages/clusters.scss

@@ -25,6 +25,12 @@
   .cluster-application-row {
     border-bottom: 1px solid $border-color;
     padding: $gl-padding;
+
+    &:last-child {
+      border-bottom: 0;
+      border-bottom-left-radius: calc(#{$border-radius-default} - 1px);
+      border-bottom-right-radius: calc(#{$border-radius-default} - 1px);
+    }
   }
 }