Remove the wl_surface argument from create_text_model request. The
wl_surface is specified as an argument in the activate request instead.
Signed-off-by: Jan Arne Petersen <jpetersen@openismus.com>
Add a wl_seat argument to the activate and deactivate requests of
text_method.
On activation a text_model gets assigned to the input_method of the
wl_seat specified in the activate request.
This is necessary because all clients need a way to create
text_models, but only one client at a time can be bound to
the input_method global (else we don't know to whom we are
supposed to send events).
