Fix autostore not displaying the error message when over pin limit

www/slide/app-slide.less

@@ -107,6 +107,7 @@
         .cp-app-slide-viewer {
             width: 50vw;
             overflow: hidden;
+            z-index: 998;
             div#cp-app-slide-modal:not(.cp-app-slide-shown) {
                 position: relative;
                 top: auto;
@@ -417,4 +418,4 @@
     pre.cp-slide-css-error {
         color: white;
     }
-}
+}