Refactor to signal-based rendering logic

[sryhanen]

Description
Requested fix to #532

• Refactor rendering logic so that business objects implement Printable interface, whose behavior is to print recursive object tree structure.
• The recursive tree structure consists of nested angular signals
• The recursive tree structure consists of nested angular signals, which wrap render (component references and component inputs) and their child nodes.
• Implement rendering hook, which is a signal update, executed on each websocket response.
• Remove push value objects.
• Implement signal based change detection for updated values (object internal properties wrapped in signals).