[6.x] Remove z-index from replicator. I think the z-2 class is unnecessar… (#14108)

* Remove z-index from replicator. I think the `z-2` class is unnecessary, and removing it fixes replicators appearing above sticky Bard toolbars

* Remove z-index from the add block button too

Author: jaygeorge

resources/js/components/fieldtypes/replicator/AddSetButton.vue

@@ -4,7 +4,7 @@
             <template #trigger>
                 <div class="inline-flex relative pt-2" :class="{ 'pt-6': showConnector }">
                     <div v-if="showConnector" class="absolute group-hover:opacity-0 transition-opacity delay-25 duration-125 inset-y-0 h-full left-3.5 border-l-1 border-gray-400 dark:border-gray-600 border-dashed z-0 dark:bg-gray-850" />
-                    <Button v-if="enabled" size="sm" :text="label" icon="plus" class="relative z-2" />
+                    <Button v-if="enabled" size="sm" :text="label" icon="plus" class="relative" />
                 </div>
             </template>
         </set-picker>

resources/js/components/fieldtypes/replicator/Set.vue

@@ -128,7 +128,7 @@ reveal.use(rootEl, () => emit('expanded'));
         <div
             layout
             data-replicator-set
-            class="relative z-2 w-full rounded-lg border border-gray-300 text-base dark:border-white/10 bg-white dark:bg-gray-900 dark:inset-shadow-2xs dark:inset-shadow-black shadow-ui-sm dark:[&_[data-ui-switch]]:border-gray-600 dark:[&_[data-ui-switch]]:border-1"
+            class="relative w-full rounded-lg border border-gray-300 text-base dark:border-white/10 bg-white dark:bg-gray-900 dark:inset-shadow-2xs dark:inset-shadow-black shadow-ui-sm dark:[&_[data-ui-switch]]:border-gray-600 dark:[&_[data-ui-switch]]:border-1"
             :class="{
                 'border-red-500': hasError
             }"