[Draft] UI Module prototype#621

Draft

KazuhiroItoh wants to merge 3 commits intonode-red:masterfrom

node-red-hitachi:dev-ui-module

Commits on Sep 25, 2020

Add UI Module prototype
KazuhiroItoh
committed

Commits on Jan 29, 2021

Fix references to other nodes using node property typing
KazuhiroItoh
committed

Commits on Mar 23, 2021

Added order acquisition code example for widgets under subgroup
KazuhiroItoh
committed