refactor global. -> globalThis.

As per:
[global is used in Node.js. Consider using the identical globalThis as it was introduced in the ECMAScript spec.](https://www.espruino.com/ReferenceBANGLEJS2#l__global_global)

Author: thyttan

apps/about/app-bangle1.js

@@ -118,7 +118,7 @@ function showData(save_file) {
     setWatch(function() {
         if (save_file) showSaveMenu(); // when select only plot, don't ask for save option
         else showMenu();
-    }, global.BTN2 ? BTN2 : BTN);
+    }, globalThis.BTN2 ? BTN2 : BTN);
 }
 
 function showBig(txt) {
@@ -250,4 +250,4 @@ function DeleteRecord(file) {
     require("Storage").erase(file);
     StorageMenu();
 }
-showMenu();
+showMenu();

apps/accelrec/app.js

@@ -165,7 +165,7 @@ Bangle.setUI({
 if (settings.loadWidgets) {
   Bangle.loadWidgets();
   require("widget_utils").swipeOn();
-} else if (global.WIDGETS) require("widget_utils").hide();
+} else if (globalThis.WIDGETS) require("widget_utils").hide();
 
 // Stop updates when LCD is off, restart when on
 Bangle.on('lcdPower', updateState);

apps/andark/app.js

@@ -4,8 +4,8 @@
   let settings = Object.assign({rp:true,as:true,vibrate:".."},
     require("Storage").readJSON("android.settings.json",1)||{}
   );
-  let _GB = global.GB;
-  global.GB = e => {
+  let _GB = globalThis.GB;
+  globalThis.GB = e => {
     // feed a copy to other handlers if there were any
     if (_GB) setTimeout(_GB,0,Object.assign({},e));
     Bangle.emit("GB",e);

apps/android/boot.js

@@ -20,7 +20,7 @@ let timeoutAutoreset;
 const resetTimeoutAutoreset = (force)=>{
   if (timeoutAutoreset) clearTimeout(timeoutAutoreset);
   setTimeout(()=>{ // Short outer timeout to make sure we have time to leave clock face before checking `Bangle.CLOCK!=1`.
-    if (enabledForApp(global.__FILE__)) {
+    if (enabledForApp(globalThis.__FILE__)) {
       timeoutAutoreset = setTimeout(()=>{
         if (Bangle.CLOCK!=1) Bangle.showClock();
       }, settings.timeout*60*1000);

apps/autoreset/boot.js

@@ -13,11 +13,11 @@
       options = mode;
     }
 
-    var currentFile = global.__FILE__ || "";
+    var currentFile = globalThis.__FILE__ || "";
 
-    if (global.BACK) delete global.BACK;
+    if (globalThis.BACK) delete globalThis.BACK;
     if (options && options.back && enabledForApp(currentFile)) {
-      global.BACK = options.back;
+      globalThis.BACK = options.back;
     }
     setUI(mode, cb);
   };
@@ -36,8 +36,8 @@
     // if it is a left to right swipe
     if (lr === 1) {
       // if we're in an app that has a back button, run the callback for it
-      if (global.BACK && countHandlers("swipe")<=settings.standardNumSwipeHandlers && countHandlers("drag")<=settings.standardNumDragHandlers) {
-        global.BACK();
+      if (globalThis.BACK && countHandlers("swipe")<=settings.standardNumSwipeHandlers && countHandlers("drag")<=settings.standardNumDragHandlers) {
+        globalThis.BACK();
         E.stopEventPropagation();
       }
     }

apps/backswipe/boot.js

@@ -22,7 +22,7 @@
     },
   };
 
-  if (global.WIDGETS && WIDGETS["recorder"]) {
+  if (globalThis.WIDGETS && WIDGETS["recorder"]) {
     appMenu[/*LANG*/"Record rides"] = {
       value : !!settings.record,
       onchange : v => {

apps/bikespeedo/settings.js

@@ -3,7 +3,7 @@ var s = require("Storage").readJSON("setting.json",1)||{};
 /* If were being called from JS code in order to load the clock quickly (eg from a launcher)
 and the clock in question doesn't have widgets, force a normal 'load' as this will then
 reset everything and remove the widgets. */
-if (global.__FILE__ && !s.clockHasWidgets) {load();throw "Clock has no widgets, can't fast load";}
+if (globalThis.__FILE__ && !s.clockHasWidgets) {load();throw "Clock has no widgets, can't fast load";}
 // Otherwise continue to try and load the clock
 var _clkApp = require("Storage").read(s.clock);
 if (!_clkApp) {
@@ -24,6 +24,6 @@ if (!_clkApp) {
   }
 }
 delete s;
-if (!_clkApp) _clkApp=`E.showMessage("No Clock Found");setWatch(()=>{Bangle.showLauncher();}, global.BTN2||BTN, {repeat:false,edge:"falling"});`;
+if (!_clkApp) _clkApp=`E.showMessage("No Clock Found");setWatch(()=>{Bangle.showLauncher();}, globalThis.BTN2||BTN, {repeat:false,edge:"falling"});`;
 eval(_clkApp);
 delete _clkApp;

apps/boot/bootloader.js

@@ -49,8 +49,8 @@ Bluetooth.on('data',function(d) {
 });
 Bluetooth.on('line',function(l) {
   if (l.startsWith('\x10')) l=l.slice(1);
-  if (l.startsWith('GB({') && l.endsWith('})') && global.GB)
-    try { global.GB(JSON.parse(l.slice(3,-1))); } catch(e) {}
+  if (l.startsWith('GB({') && l.endsWith('})') && globalThis.GB)
+    try { globalThis.GB(JSON.parse(l.slice(3,-1))); } catch(e) {}
 });\n`;
 } else {
   if (s.log>=2) boot += `_DBGLOG=require("Storage").open("log.txt","a");
@@ -73,7 +73,7 @@ if (s.log) boot += `E.on('errorFlag', function(errorFlags) {
   E.getErrorFlags();
 });\n`;// E.getErrorFlags() -> clear flags so we get called next time
 // stop users doing bad things!
-if (global.save) boot += `global.save = function() { throw new Error("You can't use save() on Bangle.js without overwriting the bootloader!"); }\n`;
+if (globalThis.save) boot += `globalThis.save = function() { throw new Error("You can't use save() on Bangle.js without overwriting the bootloader!"); }\n`;
 // Apply any settings-specific stuff
 if (s.options) boot+=`Bangle.setOptions(${E.toJS(s.options)});\n`;
 if (s.brightness && s.brightness!=1) boot+=`Bangle.setLCDBrightness(${s.brightness});\n`;
@@ -85,7 +85,7 @@ if (s.bleprivacy || (s.passkey!==undefined && s.passkey.length==6)) {
 if (s.blename === false) boot+=`NRF.setAdvertising({},{showName:false});\n`;
 if (s.whitelist && !s.whitelist_disabled) boot+=`NRF.on('connect', function(addr) { if (!NRF.ignoreWhitelist) { let whitelist = (require('Storage').readJSON('setting.json',1)||{}).whitelist; if (NRF.resolveAddress !== undefined) { let resolvedAddr = NRF.resolveAddress(addr); if (resolvedAddr !== undefined) addr = resolvedAddr + " (resolved)"; } if (!whitelist.includes(addr)) NRF.disconnect(); }});\n`;
 if (s.rotate) boot+=`g.setRotation(${s.rotate&3},${s.rotate>>2});\n` // screen rotation
-boot+=`Bangle.loadWidgets=function(){if(!global.WIDGETS)eval(require("Storage").read(".widcache"))};\n`;
+boot+=`Bangle.loadWidgets=function(){if(!globalThis.WIDGETS)eval(require("Storage").read(".widcache"))};\n`;
 // ================================================== FIXING OLDER FIRMWARES
 // deleting stops us getting confused by our own decl. builtins can't be deleted
 // this is a polyfill without fastloading capability
@@ -175,7 +175,7 @@ require('Storage').write('.boot0',bootPost,fileOffset);
 delete boot,bootPost,bootFiles;
 // ================================================== .WIDCACHE for widgets
 let widgetFiles = require("Storage").list(/\.wid\.js$/);
-let widget = `// Made by bootupdate.js\nglobal.WIDGETS={};`, widgetPost = `var W=WIDGETS;WIDGETS={};
+let widget = `// Made by bootupdate.js\nglobalThis.WIDGETS={};`, widgetPost = `var W=WIDGETS;WIDGETS={};
 Object.keys(W).sort((a,b)=>(0|W[b].sortorder)-(0|W[a].sortorder)).forEach(k=>WIDGETS[k]=W[k]);`; // sort
 if (DEBUG) widget+="var _tm=Date.now();";
 outputFileComplete = (dst,fn) => {

apps/boot/bootupdate.js

@@ -121,7 +121,7 @@ function draw(){
 
 
 // This can get called for the boot code to show what's happening
-global.showStatusInfo = function(txt) {
+globalThis.showStatusInfo = function(txt) {
   var R = Bangle.appRect;
   g.reset().clearRect(R.x,R.y2-8,R.x2,R.y2).setFont("6x8");
   txt = g.wrapString(txt, R.w)[0];