currently cursor handle is created per zoom. So when cursor is created
at 100% zoom it will be reused even if you change the cursor size from
accessibility setting. With this change we create a new cursor handle
with the key combination of (zoom x accessibilityFactor).

Fixes: https://github.com/eclipse-platform/eclipse.platform.swt/issues/2833

# Conflicts:
#	bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/Cursor.java