Remove z-index

src/Umbraco.Web.UI.Client/src/views/propertyeditors/blocklist/umb-block-list-property-editor.less

@@ -79,7 +79,6 @@ ng-form.ng-invalid-val-server-match-settings > .umb-block-list__block > .umb-blo
 }
 .umb-block-list__block--actions {
     position: absolute;
-    z-index:999999999;// We always want to be on top of custom view, but we need to make sure we still are behind relevant Umbraco CMS UI. ToDo: Needs further testing.
     top: 10px;
     right: 10px;
     font-size: 0;