BUG Allow usage of SubsiteTreeDropdownField when SubsiteID is set in PHP, not through CopyContentFromID dropdown
BUG Allow usage of SubsiteTreeDropdownField when SubsiteID is set in PHP, not through CopyContentFromID dropdown

danaenz/silverstripe-subsites,dnadesign/silverstripe-subsites,mikenz/silverstripe-simplesubsites,danaenz/silverstripe-subsites,wernerkrauss/silverstripe-subsites,mandrew/silverstripe-subsites,mandrew/silverstripe-subsites,silverstripe/silverstripe-subsites,dnadesign/silverstripe-subsites,wernerkrauss/silverstripe-subsites,mikenz/silverstripe-simplesubsites,silverstripe/silverstripe-subsites