Update OIDC presentation (#987)

* Present OIDC directly on the ServerConfirmationScreen.

Read the actual window from the view.

* Pop back to the confirmation screen when a user enters an MXID that needs OIDC.

* Remove OIDC error handling from the login screen.

ElementX/Sources/Screens/Authentication/SoftLogoutScreen/SoftLogoutScreenViewModel.swift

@@ -43,6 +43,9 @@ class SoftLogoutScreenViewModel: SoftLogoutScreenViewModelType, SoftLogoutScreen
             callback?(.clearAllData)
         case .continueWithOIDC:
             callback?(.continueWithOIDC)
+        case .updateWindow(let window):
+            guard state.window != window else { return }
+            Task { state.window = window }
         }
     }