🐛 Scrapbox.PopupMenu is always avairable

Author: takker99

scrapbox.d.ts

@@ -15,7 +15,7 @@ export type Scrapbox =
       pages: PageBrief[];
     };
     TimeStamp: TimeStamp;
-    PopupMenu?: {
+    PopupMenu: {
       addButton: (
         props: {
           title: string | ((selectedText: string) => string);