[FIX] mail: avoid fetching messages when updating ui
[FIX] mail: avoid fetching messages when updating ui

Every time the user updates a message, the js code triggered a rpc to
refetch messages in the current channel.  This is useless, since the new
messages have been fetched anyway by the bus.

microcom/odoo,hip-odoo/odoo,sysadminmatmoz/OCB,Elico-Corp/odoo_OCB,dfang/odoo,Elico-Corp/odoo_OCB,laslabs/odoo,Elico-Corp/odoo_OCB,microcom/odoo,storm-computers/odoo,ygol/odoo,hip-odoo/odoo,stephen144/odoo,optima-ict/odoo,storm-computers/odoo,ygol/odoo,laslabs/odoo,microcom/odoo,hip-odoo/odoo,stephen144/odoo,bplancher/odoo,sysadminmatmoz/OCB,sysadminmatmoz/OCB,laslabs/odoo,storm-computers/odoo,stephen144/odoo,sysadminmatmoz/OCB,hip-odoo/odoo,laslabs/odoo,dfang/odoo,dfang/odoo,optima-ict/odoo,dfang/odoo,ygol/odoo,ygol/odoo,bplancher/odoo,bplancher/odoo,optima-ict/odoo,laslabs/odoo,microcom/odoo,storm-computers/odoo,stephen144/odoo,microcom/odoo,sysadminmatmoz/OCB,dfang/odoo,hip-odoo/odoo,storm-computers/odoo,optima-ict/odoo,sysadminmatmoz/OCB,ygol/odoo,bplancher/odoo,optima-ict/odoo,laslabs/odoo,microcom/odoo,ygol/odoo,stephen144/odoo,sysadminmatmoz/OCB,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,dfang/odoo,stephen144/odoo,bplancher/odoo,storm-computers/odoo,optima-ict/odoo,hip-odoo/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,ygol/odoo