fix: idle icon not visible on macos when full screen (#1235)

Author: setchy

assets/images/tray-idle.png renamed to assets/images/tray-idleTemplate.png

@@ -7,7 +7,12 @@ const path = require('node:path');
 // TODO: Remove @electron/remote use - see #650
 require('@electron/remote/main').initialize();
 
-const idleIcon = path.join(__dirname, 'assets', 'images', 'tray-idle.png');
+const idleIcon = path.join(
+  __dirname,
+  'assets',
+  'images',
+  'tray-idleTemplate.png',
+);
 const activeIcon = path.join(__dirname, 'assets', 'images', 'tray-active.png');
 
 const browserWindowOpts = {