Bug: Stack Wallet app window fails to render if Tor fails to select a random port

[sneurlax]

Is there an existing issue for this?

• [X] I have searched the existing issues

Current Behavior

Today on Linux Desktop, Tor failed to select a random port. The app just hung on a grey screen pre-loading-icon.

Expected Behavior

Something else

Reproduce Steps

Hard to reproduce--manually force it to fail to find a port to reproduce the behavior

Environment

Ubuntu 20.04 Linux Desktop

Logs

No response

Further Information

No response

[sneurlax]

Hit this again just now.

[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Exception: Failed to get random unused port!
#0      Tor.start (package:tor_ffi_plugin/tor_ffi_plugin.dart:110:9)
<asynchronous suspension>
#1      TorService.start (package:stackwallet/services/tor_service.dart:74:7)
<asynchronous suspension>
#2      main (package:stackwallet/main.dart:179:5)
<asynchronous suspension>

[sneurlax]

This is no longer the case! Tor can fail to start with this error but the UI doesn't indicate this issue.