[IMP] crm : usabilitu improvements (default filters, load to opp wizard)

...le converting leadtoopportunity,Improved leadtoopportunity wizard,Hide Mark-As-Lost in lead, mail : Improved mail compose wizard
hello,
the purpose of this task to remove the mark as lost stage in the list view inside more option of lead.in this issue mark as lost stage in lead and opportunity is appear from crm_lead_view.xml file.
so i put this function to give individual effect in more dropdownlist if type is lead .because we want to show this mark as lost stage only in opportunity.