FEATURE - Save Last Opened Tab

[Mikaela Caron]

Describe the feature you want the app to have that it currently doesn't

• Open the same tab that the user had open when they closed the app
  • If the user was on the Settings tab when they closed / backgrounded the app, when the app opens again, it should open back to the Settings tab, rather than the default tab
• Track this by using user defaults (AppStorage), with the key lastTabOpen

Describe alternatives you've considered

• N/A

Additional context

• N/A

[Andreas Seeger]

I'd like to give this a shot.

[Mikaela Caron]

Closed with #115