[NUI] Remove potential of memory leak

[NUI] Remove potential of memory leak

Some Interop API required Delete pairwisely.
This is cause IntPtr have same role as Native size's BaseHandle.
It mean, they increase Native side reference count of BaseObject,
and should decrease the reference by delete it self.
But that IntPtr created in c++ side, so also should delete in c++ side.

Registry.cs use IntPtr as Key so, some API us it as wrong way.
If someone find matched value in Registry, it is just one of BaseHandle.
inputed IntPtr required to delete but some API didn't delete it!

This patch find that case, and make them remove well.

Signed-off-by: Eunki, Hong <eunkiki.hong@samsung.com>