messagegui: use global consistently, not globalThis.

Author: thyttan

apps/messagegui/app.js

@@ -722,10 +722,10 @@ function checkMessages(options) {
     delete newMessages[0].show; // stop us getting stuck here if we're called a second time
     showMessagesScroller(newMessages[0]);
     // buzz after showMessagesScroller, so being busy during scroller setup doesn't affect the buzz pattern
-    if (globalThis.BUZZ_ON_NEW_MESSAGE) {
+    if (global.BUZZ_ON_NEW_MESSAGE) {
       // this is set if we entered the messages app by loading `messagegui.new.js`
       // ... but only buzz the first time we view a new message
-      globalThis.BUZZ_ON_NEW_MESSAGE = false;
+      global.BUZZ_ON_NEW_MESSAGE = false;
       // messages.buzz respects quiet mode - no need to check here
       require("messages").buzz(newMessages[0].src);
     }