bug(developer): developer should remember last presentation, platform, layer when reopening touch layout file

> Something I mentioned in the video but which I forgot to write here is that it would also be nice if upon startup KD could remember the View Controls, Platform, and Layer choices I had when I last closed KD.
>
> I tested this behavior by creating a new project in 17.0.305-beta and importing the Latin American keyboard. Then in Touch Layout I selected "Template..." and then the option, "template-latin.keyman-touch-layout". I selected View Control to be "iPad (portrait) and then Layer to be "Symbol." I then saved the project. When I restarted KD, it was back to landscape and the default layer.

_Originally posted by @alex-larkin in [#11209](https://github.com/keymanapp/keyman/issues/11209#issuecomment-2050173252)_