Translate-Now: Ability to use a second translator engine for full page translations

[SuperPat45]

I use Translate-Now with the DeepL because it offer the best translations.

As it does not currently support translating a full page, when you click on the extension icon, it open the DeppL page with the URL inside the textarea and we don't have the "Translate page" item in the main context menu.

It will bu useful to have ability to select google as a second translator engine for full page translation in this case (and eventually when source language is unsupported by DeepL according to the HTML tag of pages).

[Smile4ever]

I've thought about it, and this is something I would like to implement.

Just a list of translation engines, that you can reorder according to your preferences. Would be cool to have for certain.