preload tinymce

ui/src/App.svelte

@@ -14,11 +14,14 @@
     import { admin } from "@/stores/admin";
     import { setErrors } from "@/stores/errors";
     import { resetConfirmation } from "@/stores/confirmation";
+    import TinyMCE from "@tinymce/tinymce-svelte";
 
     let oldLocation = undefined;
 
     let showAppSidebar = false;
 
+    let isTinyMCEPreloaded = false;
+
     $: if ($admin?.id) {
         loadSettings();
     }
@@ -142,3 +145,15 @@
 </div>
 
 <Confirmation />
+
+{#if showAppSidebar && !isTinyMCEPreloaded}
+    <div class="tinymce-preloader hidden">
+        <TinyMCE
+            scriptSrc="{import.meta.env.BASE_URL}libs/tinymce/tinymce.min.js"
+            conf={CommonHelper.defaultEditorOptions()}
+            on:init={() => {
+                isTinyMCEPreloaded = true;
+            }}
+        />
+    </div>
+{/if}