Back button should minimise app when pressed on home page

[chrismclarke]

Currently whilst pressing the back button on the home page nothing happens. Ideally it should close/minimise the app.

Could possibly be done via https://ionicframework.com/docs/native/app-minimize, and registering back button (https://capacitorjs.com/docs/apis/app). Will also need to make sure it is not every press, only when pressed from home screen.

Here's an issue on github where people mention it, I'm not sure if there might be other better solutions since then: https://github.com/ionic-team/capacitor/issues/1933