[MIG] bi_sql_editor : from 15.0 to 16.0

- move menu and action in according view file
- use new sql_request_abstract menu entry for SQL views configuration
- Use sql_request_abstract primary tree view
- Use sql_request_abstract primary form view
- move has_grouped_changed in sql_request_abstract module
- improve demo data
- add default count value to display in pivot, if no pivot_measures are defined ;
- set widget handle to sequence field
- reorder fields in tree view and add optional hide for some fields
- simplify : make field_description field required
- improve : add optional='hide' and 'show' on tree visibility
- replace obsolete base.menu_board_root by spreadsheet_dashboard entries
- update translation

bi_sql_editor/readme/USAGE.rst

@@ -1,13 +1,10 @@
 To use this module, you need to:
 
-#. Go to 'Reporting' / 'Custom Reports'
+#. Go to 'Dashboards > SQL Reports'
 
 #. Select the desired report
 
   .. figure:: ../static/description/05_reporting_pivot.png
      :width: 800 px
 
-* You can switch to 'Pie' chart or 'Line Chart' as any report,
-
-  .. figure:: ../static/description/05_reporting_pie.png
-     :width: 800 px
+* You can switch to 'Graph' or 'tree' views as any report.