In RQM 4.0.6 in the 'Manage Project Properties' area.

I can create category values, and sub categories, but when I try to use the 'Add values' feature to reuse values (ie: use existing values from a different category, or reuse test case values under a test script category, there is no way to directly save the changes

While the 'Add Values' does not enable the 'Save' feature on top level categories in either the Test Case or Test Script section, if you have sub Categories then the 'Edit SubCategory Values' will perform a similar function and enable the 'Save' button so changes can be saved.

In situations where I try to 'Add Value' at the top level the value will be added to the list, but the 'Save' buttin is not enabled and I can not save the change.

I can create and delete a 'bogus' value after I use the 'Add Category' feature which then enables the save button, but that's very inconvenient.

To reproduct:

Go to the 'Manage Project Properties' page
Select 'Test Case Categories'
Create two values
Create a sub category on those values
Create a couple of values in one of the categories
save your changes
Go to the second category and attempt to use the 'Add Value' to add a value from the first sub category
Observe that when you 'Add' the values the 'Save' button is not enabled and you can not save the 'Added' values.