Eliminate the risk of getting stuck when loading a hidden wallet

[wendys-cats]

Describe the issue
It is not always noticeable when server is closed/refuses connection, which can lead to unfortunate situations if the user does not realise the server is down/not responsing, like forever loading wallet either when trying to add hidden wallet or upon re-opening suite. It would be desirable to check responses from electrum server more/to showcase the connection status change in a more visible manner.

Info:

• Remembered Wallet: N/A
• Suite Version: develop app
• Browser: N/A
• OS: Windows 10
• Bridge: bundled 2.0.31
• Firmware Version: TT 2.4.3

How to reproduce

1. Connect to electrum server (BTC full node), preferably one that is in high-usage (like electrum.blockstream.info:50002:s, list of available servers here)
2. Wait for server to refuse connection
3. Try to create new (hidden) wallet
4. Forever loading happens, discovery is not in proccess

Expected behavior
Suite will showcase more visibly the server connection status, so user will not try to run discovery when there is no connection to BE.

Additional context
This is not a basic functionality and IMHO users utilising it should understand the functionality and possible drawbacks that come with it.

[hynek-jina]

Todo

Unify the path for hidden wallet with regular wallet:

• After entering the passphrase go straight to the Suite Dashboard (remove checking balance loading popup)
• Show (already existing) modal for empty wallet confirmation separately (if needed → logic remains the same as in current version)
  

[Kixunil]

Looks like this would greatly benefit from my proposal being implemented. Since that one is stuck, I'm tempted to persuade people to just o with it (perhaps as an experimental feature) out-of-standard. It's designed to not break anything anyway.