[FIX]account : account invoice balance is double the total
[FIX]Hide the margin in SO if you see SO as a customer through portal, if 'Display margin on sale orders' is activated
[FIX]crm : delete with super user to avoid access rules because if there is any user (not have delete access of lead) than also merge opportunity
[hr_hlidays] : Calender view display False value if no user_id
[FIX] hr: display the employee instead of the user in the calendar view
[FIX] account, usability: restrict the choice of the account to the ones with type 'other' for income and expense account of product and invoice line
[FIX] sale_margin: when sharing a SO with a customer, don't show the margin
[FIX] crm: after a merge of several leads/opportunities, delete the old records as the SUPERUSER to avoid security issues.