cleanup hint code

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4669 43c1dc8c-776e-4df2-8ef1-6e829299be21
use the same dnd code for shared and simple line

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4670 43c1dc8c-776e-4df2-8ef1-6e829299be21