fix can't save ssh config when edit a conifg item

tower: https://tower.im/projects/7b1652a09dce47cabb33a418d28ea652/todos/7f199c591f4343eabd3a07dea1ea29f6/

Change-Id: Ic62f0ae9de450f77c9f3763751a03f96fa2b5bfe