Revert "^.wuijs-back 返回按钮没有上一页时隐藏"

This reverts commit 64be75d48794f7fd126285829ba0a3652180d384.
Revert "Revert "^.wuijs-back 返回按钮没有上一页时隐藏""

This reverts commit 59a767c91bec0d0309b21dc8cdf48d456257879c.