Update models/main to initialize the plugin dbui.

models/main.py

@@ -17,6 +17,7 @@ Note:
 
 """
 from gluon import current
+from gluon.tools import PluginManager
 from model_core import Core
 from model_selector import Selector
 from plugin_dbui import configure_forms, configure_grids, Dbui
@@ -48,6 +49,8 @@ T.lazy = True                                       # immediate translation
 #
 # Configure plugin_dbui
 #
+plugins = PluginManager()
+plugins.dbui.pname = "plugin_dbui"
 
 Dbui.define_paths(
     app_about="static/plugin_dbui/ABOUT.html",