Lexical: Refined editor UI

- Cleaned up dropdown lists to look integrated
- Added icons for color picker clear and menu list items

resources/js/wysiwyg/ui/framework/blocks/menu-button.ts

@@ -0,0 +1,15 @@
+import {EditorButton} from "../buttons";
+import {el} from "../../../utils/dom";
+import arrowIcon from "@icons/chevron-right.svg"
+
+export class EditorMenuButton extends EditorButton {
+    protected buildDOM(): HTMLButtonElement {
+        const dom = super.buildDOM();
+
+        const icon = el('div', {class: 'editor-menu-button-icon'});
+        icon.innerHTML = arrowIcon;
+        dom.append(icon);
+
+        return dom;
+    }
+}