[FIX] account_analytic_plans: _convert_ref takes only 1 arg

Since the convert of account_invoice to the new api.
_convert_ref is defined as a staticmethod in account_invoice.py
[ADD] crm: use company/contact name for fill partner_info in chatter

Sometimes, when you send an email in the chatter, a pop-up is displayed to fill the partner details
This case happens when the email address you send the email is not associated to an existing partner
In such cases, in lead, we use the company name and contact name to fill the partner name
[FIX] web: css tweaks