This allows resizing the palette without changing the object pointer.

This makes it unnecessary to hold the GDI lock during destruction.

This makes it unnecessary to hold the GDI lock since the object
cannot be accessed before it has a handle.

It's not consistent across different Windows versions.

Round the expected sizes up to the alignment used by HeapSize, which
is 4 on Win9x and NT4 but 1 in more recent versions.

Additionally fix an IGlobalInterfaceTable test which erroneously
succeeds on these older OSs.

ole32: The bigblockfile on ILockBytes implementation should work on any ILockBytes not just those based on HGLOBAL.

The internal style flags are used to determine whether to show or hide
the scrollbar when ME_UpdateScrollBar is called.  EM_SHOWSCROLLBAR seems
to update this state in native richedit controls.