4 issues regarding "Select node on startup" option

[myxmaster]

Describe the bug

1. We should rename the option to "Select wallet on startup", since we shifted from node to wallet elsewhere too.
2. If you restart Zeus so the "Wallets" screen is displayed, you can go back (via back icon or Android back button). It will bring you back to "Balance" view shortly and then you are automatically taken back to "Wallets" view.
   -> We should avoid this by hiding back icon and block Android back button in this scenario.
3. Although user did not make a decision yet to which wallet Zeus should connect, it is visible that the 1st wallet in the list is "Active".
   -> No connection should be established.
4. Users might understand this option so they have to pick a Wallet everytime they start Zeus, but it will only work in case Zeus was killed (manually or by battery management, phone restart etc.).
   -> Should we display "Wallets" screen even when Zeus is opened after being in background? If yes: In this case, existing connections should not be killed and the last used wallet should be visible as "Active".

Reproduce

...

ZEUS version

v0.9.3

Node interface

Multiple (specified in comments)

Network

Clearnet

Device

Pixel 7 Pro emulator

Device operating system

Android 14

Log output

No response