[IMP] merge mass_operation_abstract into base

Author: hbrunn

openupgrade_scripts/apriori.py

@@ -100,6 +100,8 @@
     "stock_account_product_cost_security": "product_cost_security",
     # OCA/server-tools
     "base_jsonify": "jsonifier",
+    # OCA/server-ux
+    "mass_operation_abstract": "base",
     # OCA/stock-logistics-reporting
     "stock_inventory_valuation_pivot": "stock_account",
     # OCA/stock-logistics-warehouse