Add settings option "Reply to all" as default

[the-djmaze]

In the settings could have the box to check the option "Reply to all" as default.

In the corporate environment, this option is used a lot, and having this option set as default would be useful.

Originally posted by @ancmto in #229 (comment)

[ancmto]

Good!

[rnalrd]

I think this should be user configurable, not made the default.

While this might be useful in corporation environment and corporation-oriented products have used this behavior by default, snappymail is being used also in non-corporation environments. Corporation-oriented products have also adopted other questionable defaults like top-posting, which doesn't really play well in all environments.

I'm just say, please don't make snappymail a corporate-only product.

Thanks

[the-djmaze]

@rnalrd well there was a feature in RainLoop named lastReplyAction.
It remembered if your last action was reply, reply all or forward.

I've removed this weird (not working) feature in favor of this request.
Obvious the default is not reply all 😉