iOS: dw_tree_get_parent() should return NULL for the root node. I missed implementing dw_tree_item_select() so, implmented now. Always return NO to the canEditTreeItem unless we have a delegate that returns YES. This prevents the swipe left to delete happening.

[Desktop Entry]
Name=Dynamic Windows Test
Exec=@prefix@/bin/dwtest 
Terminal=false
MultipleArgs=false
Type=Application
Categories=Application;Development;X-Red-Hat-Base;