Adding margin to last cluster icon

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>

src/renderer/components/cluster-manager/clusters-menu.scss

@@ -18,6 +18,10 @@
     padding: 0 $spacing; // extra spacing for cluster-icon's badge
     margin-bottom: $spacing;
 
+    > :last-child {
+      margin-bottom: $margin;
+    }
+
     &:empty {
       display: none;
     }