gittree: allow to disable using datetime for diff

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
patch: just fix some tiny issue

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
patch: remove devicetree@vger.kernel.org from maillist

remove useless mail list devicetree@vger.kernel.org.

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
webui: add config for show items size

add config 'ui.main.showitems' for show items
size.

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
misc: update latest change to err_ptr_ret_chk_creator.py

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>