Override io.WantCaptureMouse on the next frame;
this does not itself consume OS events.
Returns
void
Remarks
Override io.WantCaptureMouse flag next frame (said flag is left for your
application to handle, typical when true it instucts your app to ignore
inputs).
This is equivalent to setting "io.WantCaptureMouse = want_capture_mouse;"
after the next NewFrame() call.
Override mouse input capture for the next frame.