Revert f267770..d500761

This rolls back to commit f267770f6bfd8d99426f2d2b820c77b1f4a1d7d9.
Revert "Revert f267770..d500761"

This reverts commit 79e89bb96ad5743277eb0c8241cc5c8ad44e2064.
编辑、删除联系人的处理
处理删除按钮显示的条件，新建时不显示