The native IAutoComplete implementation takes care to retrieve the completions
from a background thread to prevent the UI from freezing while they're being
generated, but we worked against it by always generating all the completions
from the main thread and just enumerating them from the background one.
Change this now and call wxTextCompleter::GetCompletions() method from the
background thread itself to never block the main one.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67514 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Add wxTextCompleter class which allows to return the possible completions
dynamically and wxTextCompleter::AutoComplete() overload using it. So far this
is only implemented for wxMSW.
Also fix calling wxTextEntry::AutoComplete(wxArrayString) multiple times under
MSW, this didn't correctly update the list of shown completions before.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67511 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
