spotrem: refactor to handle ui all inside setUI

and fix lint warnings

apps/spotrem/ChangeLog

@@ -11,3 +11,4 @@ when fastloading.
 0.10: Some refactoring to shorten the code.
 0.11: Further refactoring to shorten the code. Fixed search and play that was broken in v0.10.
 0.12: Fix some warnings from the linter.
+0.13: Move ui-handlers inside setUI-call.

apps/spotrem/app.js

@@ -14,7 +14,6 @@ let gfx = function() {
   widgetUtils.hide();
   R = Bangle.appRect;
   const MARIGIN = 8;
-  // g.drawString(str, x, y, solid)
   g.clearRect(R);
   g.reset();
 
@@ -100,23 +99,17 @@ let swipeHandler = function(LR, _) {
 
 // Navigation input on the main layout
 let setUI = function() {
-// Bangle.setUI code from rigrig's smessages app for volume control: https://git.tubul.net/rigrig/BangleApps/src/branch/personal/apps/smessages/app.js
   Bangle.setUI(
     {mode : "updown",
-      remove : ()=>{
-        Bangle.removeListener("touch", touchHandler);
-        Bangle.removeListener("swipe", swipeHandler);
-        clearWatch(buttonHandler);
-        widgetUtils.show();
-      }
+     touch: touchHandler,
+     swipe: swipeHandler,
+     btn: ()=>load(),
+     remove : ()=>widgetUtils.show(),
     },
       ud => {
         if (ud) Bangle.musicControl(ud>0 ? "volumedown" : "volumeup");
       }
   );
-  Bangle.on("touch", touchHandler);
-  Bangle.on("swipe", swipeHandler);
-  let buttonHandler = setWatch(()=>{load();}, BTN, {edge:'falling'});
 };
 
 // Get back to the main layout

apps/spotrem/metadata.json

@@ -1,7 +1,7 @@
 {
   "id": "spotrem",
   "name": "Remote for Spotify",
-  "version": "0.12",
+  "version": "0.13",
   "description": "Control spotify on your android device.",
   "readme": "README.md",
   "type": "app",