patch [#37305] Quick Hack: Armature Mirror Select
from Terry Struven (tlstruven), with some modifications.


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@61152 954f8c5b-7b00-dc11-b283-0030488c597c
missing from last commit


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@61153 954f8c5b-7b00-dc11-b283-0030488c597c