Bangle2 add software back via setUI

apps/about/ChangeLog

@@ -10,3 +10,4 @@
 0.10: Added separate Bangle.js 2 file with Bangle.js 2 kickstarter pixels (as of 28 Oct 2021)
 0.11: Bangle.js2: New pixels, btn1 to exit
 0.12: Actual pixels as of 29th Nov 2021
+0.13: Bangle.js 2: Use setUI to add software back button

apps/about/app-bangle2.js

@@ -69,4 +69,8 @@ function drawImage() {
 
 // TODO: a nice little animation before
 setTimeout(drawInfo, 1000);
-setWatch(_=>load(), BTN1);
+Bangle.setUI({
+  mode : "custom",
+  back : load,
+  btn : load
+});

apps/about/metadata.json

@@ -1,7 +1,7 @@
 {
   "id": "about",
   "name": "About",
-  "version": "0.12",
+  "version": "0.13",
   "description": "Bangle.js About page - showing software version, stats, and a collaborative mural from the Bangle.js KickStarter backers",
   "icon": "app.png",
   "tags": "tool,system",