We need to update calls to gtk_style_context_set_state() in
gtkimcontextime.c, so that the state passed into that function would be in
line with what GtkStyleContext expects, due to updates in the CSS
machinery, as outlined in this link, which is based on information in
in Matthias' blog.
Doing so will silence the gtk_style_context_set_state() warnings, which is
emitted when a widget uses gtkimcontext on Windows with CJK IME, which will
in turn call gtkimcontextime.