VirtualTreeView 7.0 XE3-DX10.2

delphi的控件 VirtualTreeView 7.0 最新版，XE3-DX10.2 V7.0: * Fixed issue #724: Error when reading "old" streams * Fixed issue #397: Horizontal autoscroll on focus does not properly scroll node into view if column width is larger than client width * Fixed issue #727: Header not repainted after loadi