Allow to set default value depending on the search query

With the autocompletion on many2one, we often type the name of the record and if we don't find it, we click on create. At this point, we have to type again the name. So if the client sent in the context the typed named, we could use it in default method to set default values and prevent to re-type it.

assigned to @ced

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+1 Good idea

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I think the client should set the rec_name key of the context with the typed name and we should create a default_method on the server to return it.

I'm not a fan of the key name 'rec_name', I think it could be too error prone. I think about something more like 'default_rec_name'.
I don't understand what is the need to create a "default_method" on the server. I think the "default_get" method could simply be extended to fill by default the value of the "_rec_name" if it is a field otherwise nothing.

Here are review22131002 and review31261002, sao will come later when the design is validated.

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New review22131002 at https://codereview.tryton.org/22131002/#ps1

New review31261002 at https://codereview.tryton.org/31261002/#ps1

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review31261002 updated at https://codereview.tryton.org/31261002/#ps20001

Here is review30351002 for sao

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New review30351002 at https://codereview.tryton.org/30351002/#ps1

New changeset b5c38a786fb7 by C?dric Krier in branch 'default':
Use 'default_rec_name' context key in Model.default_get
http://hg.tryton.org/trytond/rev/b5c38a786fb7

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closed

New changeset 2a1025c19784 by C?dric Krier in branch 'default':
Set 'default_rec_name' context key when query default_get
http://hg.tryton.org/tryton/rev/2a1025c19784

New changeset 5b447f80162c by C?dric Krier in branch 'default':
Set 'default_rec_name' context key when query default_get
http://hg.tryton.org/sao/rev/5b447f80162c