[hotfix] rendering of parent attribute list

[Munin33]

🔥 List of parent attributes not rendering correctly

When you create a resource type and want to change the parent type after the first selection, the list with the parentattributes does not re-render to match the new parents attributes.

🔍 To Reproduce [if necessary]

Steps to reproduce the behavior:

1. Go to 'resourcetypes'
2. create a new type
3. choose an arbitrary resource type as parent type
4. click the "back" button to choose an other resource type (with different attributes) as parent
5. see the error: the parent type attribute list is still the old list.

🚒 Possible Solution

• use a watchdog (or dirty workaround to force the list to re-render)