fix: popup style in latest Chrome

src/popup/style.css

@@ -1,6 +1,8 @@
 body {
   width: 320px;
   max-width: 100%;
+  /* Latest Chrome renders an extra blank for a nonexistent scrollbar */
+  overflow: hidden;
   background: #f8f8f8;
   @media (min-width: 360px) {
     width: 100%;