[FIX] only reload m2m listview once after adding n records to it (via dialog)
[FIX] only reload m2m listview once after adding n records to it (via dialog)

The listview does not support concurrent reload requests, either wait
for the previous reload to finish before sending the new one, or just
send a single reload.

For m2m, can wait and do a single reload so do that.


akretion/openerp-web,havt/openerp-web,akretion/openerp-web,havt/openerp-web,havt/openerp-web,havt/openerp-web,akretion/openerp-web,havt/openerp-web