Hide add column icon when disable column addition flag is set

packages/frontend-core/src/components/grid/layout/HeaderRow.svelte

@@ -4,8 +4,14 @@
   import HeaderCell from "../cells/HeaderCell.svelte"
   import { Icon } from "@budibase/bbui"
 
-  const { renderedColumns, dispatch, scroll, hiddenColumnsWidth, width } =
-    getContext("grid")
+  const {
+    renderedColumns,
+    dispatch,
+    scroll,
+    hiddenColumnsWidth,
+    width,
+    config,
+  } = getContext("grid")
 
   $: columnsWidth = $renderedColumns.reduce(
     (total, col) => (total += col.width),
@@ -23,6 +29,7 @@
       {/each}
     </div>
   </GridScrollWrapper>
+  {#if $config.allowAddColumns}
     <div
       class="add"
       style="left:{left}px"
@@ -30,6 +37,7 @@
     >
       <Icon name="Add" />
     </div>
+  {/if}
 </div>
 
 <style>