[Manager] Fix flush timing issue when switching tabs (#4253)

Author: christian-byrne

src/components/common/VirtualGrid.vue

@@ -106,7 +106,7 @@ const updateItemSize = () => {
 }
 const onResize = debounce(updateItemSize, resizeDebounce)
 watch([width, height], onResize, { flush: 'post' })
-whenever(() => items, updateItemSize)
+whenever(() => items, updateItemSize, { flush: 'post' })
 onBeforeUnmount(() => {
   onResize.cancel() // Clear pending debounced calls
 })

src/components/dialog/content/manager/ManagerDialogContent.vue

@@ -59,7 +59,7 @@
               <VirtualGrid
                 id="results-grid"
                 :items="resultsWithKeys"
-                :buffer-rows="3"
+                :buffer-rows="4"
                 :grid-style="GRID_STYLE"
                 @approach-end="onApproachEnd"
               >