Husen Daudi

Added close button in tab header.

New field type is added in trunk. Example: In tree view of partner you can see country and city of first partner's address. Following fields are added in partner object. 'city':fields.related('address', 'city', type='char ', string='City'), 'country':fields.related('address','country_id',type='many2one',relation='res.country',string='Country'), Where address is the one2many field on partner object.