Animate popovers for header cells and adding columns

packages/frontend-core/src/components/grid/cells/HeaderCell.svelte

@@ -173,7 +173,6 @@
   align="right"
   offset={0}
   popoverTarget={document.getElementById(`grid-${rand}`)}
-  animate={false}
   customZindex={100}
 >
   {#if editIsOpen}

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

@@ -7,6 +7,7 @@
 
   let anchor
   let open = false
+
   $: columnsWidth = $renderedColumns.reduce(
     (total, col) => (total += col.width),
     0
@@ -17,6 +18,7 @@
   const close = () => {
     open = false
   }
+
   onMount(() => subscribe("close-edit-column", close))
 </script>
 
@@ -35,7 +37,6 @@
   align="right"
   offset={0}
   popoverTarget={document.getElementById(`add-column-button`)}
-  animate={false}
   customZindex={100}
 >
   <div