We also need to check if the selected image is "Create your own image"
and set it as active.
Besides, to avoid the impact of set_active(), we need to move the
connect signal in the end of the update_image_combo() function.
(Bitbake rev: 54ae7ddac450b4717e5ccae3bfe9acb479449451)
Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>