Do not set automatically as value the unique record found

As search is fuzzy (done with ilike) we need to ensure that the user validate
the value by selecting it.

Closes #11840

tryton/tryton/gui/window/view_form/view/form_gtk/many2many.py

@@ -188,13 +188,7 @@ class Many2Many(Widget):
             new=self.create_access,
             title=self.attrs.get('string'))
         win.screen.search_filter(quote(value))
-        if len(win.screen.group) == 1:
-            callback([
-                    (r.id, r.value.get('rec_name', ''))
-                    for r in win.screen.group])
-            win.destroy()
-        else:
-            win.show()
+        win.show()
 
     def _sig_remove(self, *args):
         self.screen.remove(remove=True)

tryton/tryton/gui/window/view_form/view/form_gtk/many2one.py

@@ -137,13 +137,7 @@ class Many2One(Widget):
                     title=self.attrs.get('string'),
                     exclude_field=self.attrs.get('relation_field'))
                 win.screen.search_filter(quote(text))
-                if len(win.screen.group) == 1:
-                    callback([
-                            (r.id, r.value.get('rec_name', ''))
-                            for r in win.screen.group])
-                    win.destroy()
-                else:
-                    win.show()
+                win.show()
                 return
         self.focus_out = True
         self.changed = True

tryton/tryton/gui/window/view_form/view/list_gtk/widget.py

@@ -829,10 +829,7 @@ class M2O(GenericText):
         if model and common.get_toplevel_window().get_focus():
             field = record[self.attrs['name']]
             win = self.search_remote(record, field, text, callback=callback)
-            if len(win.screen.group) == 1:
-                win.response(None, Gtk.ResponseType.OK)
-            else:
-                win.show()
+            win.show()
 
     def editing_started(self, cell, editable, path):
         super(M2O, self).editing_started(cell, editable, path)