Remember mode on restart

[TwentyH]

Q	A
Device?	iPhone
Device Os version	14
App Version	2.0
Wallabag server version	2.0

Steps to reproduce/test case

Today, when the app is closed and opened again, the "mode" (All, Starred, Unread, Read) is reset to the default option in the settings screen.

Improvement

The mode at restart should be the mode that was in use when the app was closed.

[bourvill]

this change is important for the rest of the users. Although I find this idea interesting. thank you for your feedback, i will see how i can do that