Feature: several things for Spectrum preparation (#1913)

* change Node persistence format

* Removing the Singleton

* mainly refactoring

* intermediate commit

* fix test

* Updated diagram

* fix tests

* removing simplejsons references

* fix tests

* remove update, tests working

* abstract Node

* refining Migration framework: run migrations until they suceed

* BrokenCoreConnectionException added to handle lost RPC + some minor error handling fixes

* clicking redirects to node config if there is no node connection

* AbstractNode

* BrokenCoreConnectionException added to handle lost RPC + some minor error handling fixes

* clicking redirects to node config if there is no node connection

* handling broken connection when there is no other error superseding (i.e. no wallets)

* Abstract Node improvements and issue fixing

* improving node_info handling

* fix test results, property device_manager in user, bcce in get_rpc in node, improved rpc property in node

* typos

* provide data_folders for extensions

* parametrizing include for node_info

* Remove initial_node_contribution refactoring welcome

* adding convenience methods

* extension data-storage

* Tests green

* Better failure resistence

* Enabling Node settings

* error handling

* adjust_view_model callback

* exception Handling

* Shielding core from extension flaws

* More consistent logging

* Refactoring wallets endpoints

* Make wallet_overview extendable

* butgifex and cleanup

* feedback by Manolis

* rename BusinessObject to PersistentObject

* fix Error-management and rollback information

* Nodes.md corrections

* frontend-aspects.md (small) corrections

* fix tests and address feedback and errormanagement

* fix tests, proper error-handling

* Fix test_util_reflection

* just some little addons to test_util_reflection

* fix cleanup_on_exit

* migration fix

* remove check, add redirect after saving node

* fix test (not that cool but what to do?)

* upgrade Flask as Flask-SQLAlchemy needs higher Flask version

* Revert "upgrade Flask as Flask-SQLAlchemy needs higher Flask version"

This reverts commit bf24120f89.

* update bug fixed + node manager added to node test

* cleanup external_node

Co-authored-by: moneymanolis <moneymanolis@protonmail.com>

mkdocs.yml

@@ -44,6 +44,7 @@ nav:
       - extensions/data-storage.md
       - extensions/callbacks.md
       - extensions/devices.md
+      - extensions/nodes.md
     
 theme: 
   name: readthedocs