Fix index for cluster wizard buttons

Author: KonradPietocha

src/components/Clusters/components/AddClusterWizard.scss

@@ -4,7 +4,7 @@
 
 .add-cluster-wizard-dialog {
   .cluster-wizard-buttons {
-    z-index: 5;
+    z-index: 101;
     position: absolute;
     left: 0;
     right: 0;