AUI-1138 TreeNodeTask have a state for when one of its children is unchecked
AUI-1138 Adding tests
AUI-1138 - Add HISTORY.md entry
AUI-1139 - Fix test#12 IE7 and below uses currentStyle instead of computedStyle
AUI-1139 - SF
AUI-1141 - tree-hitarea icon should change when treeview is generated from markup
AUI-1141 - Test if tree-hitarea icon changes on expand and collapse
AUI-1141 - Update history
AUI-1141 - SF