No redirect to logout when already logged out

[distantnative]

Avoid redirect loops

@bastianallgeier not sure if the second part is a correct fix to our blank error dialogs issue

[bastianallgeier]

@distantnative I think we could potentially lose stuff in the error object this way. I.e. the code.

[distantnative]

But without it our panel shows empty dialogs etc. it doesn’t seem able to handle actual error instances

[bastianallgeier]

I've looked at it again, and we might indeed find out that we miss keys from the object later. But it's no problem to add them here.