Fix functionality to hide back button when configuration is set (#2852)

In version 5, the option to hide the back button functioned correctly,
ensuring the button was not displayed when configured to be hidden.
However, this behaviour regressed in the new UI. This commit reinstates
the original functionality, ensuring the back button is properly hidden
when the corresponding option is enabled.

resources/js/components/headers/BackLinkButton.vue

@@ -1,5 +1,12 @@
 <template>
-	<Button as="a" :href="props.config.back_button_url" severity="secondary" text class="border-none">
+	<Button
+		as="a"
+		:href="props.config.back_button_url"
+		severity="secondary"
+		text
+		class="border-none"
+		:class="props.config.back_button_enabled ? '' : 'hidden'"
+	>
 		<i class="pi pi-home sm:hidden" />
 		<span class="hidden sm:inline">{{ props.config.back_button_text }}</span>
 	</Button>