fix: super note improvements (#1991)

* fix: super note previews

* fix; checkmark size

* fix: top padding

* fix: prevent delete shortcut

* fix: spellcheck control

* fix: only embed file if uploaded to current note

* fix: ability to create new tag from editor autocomplete

* feat: protected file embed handling

* fix: event payload

packages/blocks-editor/src/Editor/Utils.ts

@@ -0,0 +1,7 @@
+export function truncateString(string: string, limit: number) {
+  if (string.length <= limit) {
+    return string;
+  } else {
+    return string.substring(0, limit) + '...';
+  }
+}