'Search more...' for inaccurate names is slow

[Daniel Hammerschmidt]

The action of the 'Search more...'-button of many2one-autocompletion-lists invokes name_search() with the current value of the input-element and without a limit. On the server name_search() invokes name_get() for each matching record. Later in the web-client if the search-popup is created, the returned names are discarded and just the ids are used for initialization.

If the user hits 'Search more..' with an empty (or inaccurate, e.g. 'e') search-value this might take a long time, i.e. if a model implements its own name_get() (e.g. res.partner).

My idea is to add a flag to the context dictionary to tell name_search() to just return the ids. To do this we need to change the action for 'Search more...' in instance.web.form.CompletionFieldMixin.get_search_result() and BaseModel._name_search().

(I will push two branches for this issue.)