[FIX] fix wrong filter in search view (account/sale)

the field section_id is created in addon sale, but used in the account
reporting views.  This commit moves the search view definition
in the correct file.

This fixes a TypeError when clicking on a + sign in the account.invoice.report.graph view, similar to what is reported at: https://www.odoo.com/nl_NL/forum/help-1/question/error-with-customer-invoice-graph-view-70665

Note that this is a bugfix from Odoo 8.0. I am not entirely clear on what the strategy is to keep up with Odoo 8.0 changes, but from https://github.com/OpenUpgrade/OpenUpgrade/pull/103#issuecomment-56507805 it appears that we're applying fixes from Odoo 8.0 like this instead of making big merges?