-since the order of the layers can potentially impact
the build outcome, users should be able to reorder
the layers within the layers dialog;
-used TreeView Drag and Drop
[YOCTO #3270]
(Bitbake rev: 2bd9a00facb90f7d76a9bdaa86ca765fb2159e71)
Signed-off-by: Cristiana Voicu <cristiana.voicu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>