Fix TUI node switching mechanism

Mateusz Żebrakrequested to merge
mzebrak/fix-node-switching into develop

There were not properly handled cases like

  • our current node is offline
  • new node is offline

Also it's better to use Clive Node instead of direct usage of AsyncHived from helpy. Clive's Node adds useful mechanism for checking online/offline status and caching basic node data.

Edited by Mateusz Żebrak

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