App on Linux without cinnamon must be terminated after closing main window

lib/main-window.js

@@ -33,6 +33,10 @@ mainWindow.webContents.sendInputEvent({
 })
 
 mainWindow.on('close', function (e) {
+  if (process.platform === 'linux' && process.env.DESKTOP_SESSION !== 'cinnamon') {
+    app.quit()
+    return true
+  }
   mainWindow.hide()
   e.preventDefault()
 })