Change the button name according to UI team's design.
This fixes [YOCTO #2126]
(From Poky rev: 1e4477f9b121b2523685cc6440050c47d3ae1cde)
(Bitbake rev: f75dde11f2d73119702026d4dd531c0b242303c7)
Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>