fix: prevent emoji autocomplete

Add an empty entry to the emoji autocompletion which allows us to press enter to continue without any random emojis in the note where we did not intend them.

Fixes #5251

Signed-off-by: Philip Molares <philip.molares@udo.edu>

frontend/src/extensions/essential-app-extensions/emoji/emoji-app-extension.ts

@@ -28,14 +28,16 @@ export class EmojiAppExtension extends AppExtension {
   }
 
   buildAutocompletion(): CompletionSource[] {
-    return [
-      regexCompletion(
-        /:(?:[\w-+]+:?)?/,
-        emojiShortcodes.map((shortcode) => ({
+    const completions = [
+      {
+        detail: '',
+        label: ':'
+      },
+      ...emojiShortcodes.map((shortcode) => ({
         detail: t('editor.autocompletions.emoji') ?? undefined,
         label: `:${shortcode}:`
       }))
-      )
     ]
+    return [regexCompletion(/:(?:[\w-+]+:?)?/, completions)]
   }
 }