Search on combobox with regional indicator (country) is not working on gtk

Since #11599 (closed), search is no more working on gtk for combobox fields with regional indicator (country, subdivision). Indeed, gtk is doing the matching from the first char which is the unicode flag.

Solution from irc:

< cedk > >maybe we should implement a https://docs.gtk.org/gtk3/method.EntryCompletion.set_match_func.html that is smarter

< cedk > I think it will not be bad because when the selection entries are composed of words, I always found annoying that it does not match for each word

added country ~842 + 1 deleted label

On sao the keyboard search also is broken but it is not possible to implement a custom search. So I think the only option is to remove the flag from the country record name.

added 1 deleted label and removed 1 deleted label

Here is review417931003 which instead remove the selection widget from the address forms. I think it is better because the selection widget prevents also to match by code which can be very convenient.

assigned to @ced

added party + 1 deleted label and removed country + 1 deleted label

Also with #11666 (closed) there will be no inopportune creation of countries or subdivisions.

New review417931003 at https://codereview.tryton.org/417931003/#ps417941003

New changeset de95a246129a by Cédric Krier in branch 'default':
Do not use selection widget for country and subdivision
https://hg.tryton.org/modules/party/rev/de95a246129a

added 1 deleted label and removed 1 deleted label

closed

New changeset 6e927f8a0862 by Cédric Krier in branch 'default':
Do not use selection widget for country and subdivision
https://hg.tryton.org/tryton-env/rev/6e927f8a0862

changed the description