Navigating modals reverts the underlying artboard

[zandermax]

When viewing a modal that is displayed over another modal when using navigation shortcuts, rather than direct interaction (i.e. via the keyboard back button or direct selection when viewing all screens), the underlying artboard is changed to the starting artboard.

Steps to reproduce:

1. Create starting artboard A1 that leads to artboard A2.
2. Create an interaction where a modal M1 shows over artboard A2.
3. Create an interaction from M1 to display another modal M2 (which will display over A2 when interacting from M1).
4. Export and navigate to M2 directly.
5. Underlying artboard is changed to A1, rather than A2 as expected.

[MaxBazarov]

Actually it selects the first dartboard which has link to this modal. But sure, it can be improved.