Removed api
[discuss to group] fixed '.msg-main top border missing sometimes' in chrome
[sf editor] fixed bugs and cleaned up code

* fixed 'font menu no content when lang is zh-cn' bug
* added back necessary '.btn-into' styles
* rm no used js/css
Improve sys admin
[useradmin] improved user-add, set/revoke admin, user-delete
Disable shared link in encrypt repo, and fix bug when deleteing home page in personal wiki.
Fixed js string bug when editing personal wiki page
Fixed table bug in wiki
Modified personal wiki title
Merge branch '1.6'