Do not set app orientation in manifest to use user setting at OS level

[astorije]

Fixes #586.

Turns out, when this setting is not set, the auto-rotate being on or off is respected as expected. Who knew!

I know @YaManicKill and @vectr0n have been testing on different devices, would be great if you guys could confirm :-)
Maybe an iOS user should confirm that things are fine on this side as well.

(I have also tried with natural, but that doesn't work for us: it means portrait for phones and landscape for tablets).

[AlMcKinlay]

Well, that's a confusing setting. I would have assumed that "orientation: any" meant that it can be any, but not that it would force it into being any. Will test this later today.

[astorije]

I know!! That what kind of a desperate move to be honest, I was not expecting that to work, but yet it did 😅

[AlMcKinlay]

Yeah, this looks fine.

From what I can see, it looks like the default is "natural" for Chrome, which I think respects the device's orientation lock.

It might be worth thinking about specifically putting this in incase any other browsers use a different default, but I'm happy either way.

👍 but I'll let you merge.

[astorije]

From what I can see, it looks like the default is "natural" for Chrome, which I think respects the device's orientation lock.

Actually, default is supposed to be any (but in practice, it's not all the time, as we are seeing here). natural means that default orientation for a given device is being used, but when I tested, it didn't respect the orientation lock.
Thing is a mess, but to be fair the whole specification for this is still a draft, so I'm guessing changes will happen. That's fine, we'll adjust when browsers do :-)