[IMP] [REF] crm: WIP and first attempt to remove state field.

crm.case.section: removed state field
crm.lead: code now use probability and on_change to fetch stages related to
Won and Lost. Improved stage management. Improved a bit the demo data.

mail: improved message_track to use browse_record instead of read result. This allows
to avoid having to track fields to be able to use them in the subtype condition.
[IMP]:Remove State field from crm,hr_recruitment and project task/issue , Rename delay to open to Delay to Assign ,delay to close on Last Updates Dates,stage in searchview
[MERGE]:with trunk
[REM]: Remove Un-used mehtods when state is remove
[MERGE]: with main
[MERGE]: with trunk
[IMP]: Calculate project issue
[IMP]: if child task is open then parent task shold not doneor close
If task is created from procurement and we done that task then sale order must be done.
[IMP]: analysis view of project task,issue, hr applicant and crm opportunity
[IMP]:make invisible mark lost in won stage
[MERGE]:sync with trunk
[IMP]:track task/issue assigned
[FIX]: Traceback when create employee
[REM]: Remove python action field from stage
-> Improve convert to opportunity button not work.
-> Mark lost shold visible any time.
[MERGE]: with trunk
[REM]: state field from crm_partner_assign
[IMP]: clean yaml for crm,hr_recruitment and project task
[MERG] : sync with trunk
[IMP]: yml for crm merge lead
[IMP]: Test case for merge lead and opportunity