List position resets if list activity is destroyed

[z3ntu]

When going from the list in the 'Home' tab to the detail view of a toot, and going back results in the list position being reset to the top if the list activity has been destroyed in the meantime (reproducible with the 'Don't keep activities' option in the Android developer settings).

---

• Tusky Version: 9.1

• Android Version: 9

• Android Device: FP3

• I searched or browsed the repo’s other issues to ensure this is not a duplicate.

[charlag]

Duplicate of #89