[contract] reactivate the closed contract at the SO's confirmation 

Hello,

 I have completed following points in this merge proposal:
  ->[IMP]Added warning message on confirmation of sales order if analytic account on analytic plan is in state 'close,pending or cancelled', also set domain to restrict 'cancelled' analytic accounts from displaying in selection.
  ->[IMP]Display warning message on confirmation of sales order. when we choose an analytic account directly and contract state is in 'close,pending or cancelled' of sales order/quotation form view .
  ->[IMP]create a new act_window action for account.analytic.account and 'pending,closed or cancelled' contract which display in tree view, When we click on "Modify Contract(s)".

please check pad for more details: https://pad.odoo.com/p/openerp-project.task-QF2LACXAMR

Thanks & Regards,
Jitendra (JPR)