[CA-72663]: Fixed: Multiple Ctrl or Shift selection using the arrow buttons makes treeview scroll right/left inconsistently

Signed-off-by: Gabor Apati-Nagy <gabor.apati-nagy@citrix.com>
[CA-112940] Fixed: HA restart button not enabled for selected VM
[CA-112327] Fixed Bug in BatchingMigrateVirtualDiskManager class
[CA-64748] Fixed Wrong context menu opens if you move the mouse quickly
Merge branch 'master' of git://hg.uk.xensource.com/carbon/trunk/xenadmin