To add auto expand the background area function for long issue text input.
(From Poky rev: f1822f0961bd719de0827e361f7e6fa3bf872746)
(Bitbake rev: f406b0a11b021f8492ed0b083d9ff89de4a14653)
Signed-off-by: Liming An <limingx.l.an@intel.com>
Signed-off-by: Shane Wang <shane.wang@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>