Merge branch 'release/0.2.6' into develop
disable border
Merge branch 'develop' of github.com:leo-project/leo_tamer into develop
update README
password confirm
add confirm_password util method
password_confirm on delete_user
improve status panel
detail grid grouping
set margin on header logo
add system_conf
add system_conf.png
set column width
button to change grouping
refactor command_filter
apply viewport header style
menu text & comment
cosmetic
improve select grouping
set selecet_grouping icons