[hub] Realtime Sync Progress

- Show progress from the migration plan
- Show products being synced
- Disallow publishing in sync state

erpnext/hub_node/doctype/hub_settings/hub_settings.json

@@ -373,7 +373,7 @@
    "bold": 0, 
    "collapsible": 0, 
    "columns": 0, 
-   "depends_on": "enabled", 
+   "depends_on": "", 
    "fieldname": "publish_section", 
    "fieldtype": "Section Break", 
    "hidden": 0, 
@@ -675,8 +675,8 @@
  "issingle": 1, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2018-07-28 00:48:21.210413", 
- "modified_by": "cave@aperture.com", 
+ "modified": "2018-07-30 08:01:09.024358", 
+ "modified_by": "Administrator", 
  "module": "Hub Node", 
  "name": "Hub Settings", 
  "name_case": "",