Globals editor doesn't see project imports

Description of problem:
When defining global variables via the Globals Editor, the Add Global Variable modal doesn't offer classes added to Import Suggestions of the project.

Version-Release number of selected component (if applicable):
BPMS 6.0.2 ER1

Steps to Reproduce:
1. Open the Project Editor - Import Suggestions section.
2. Add new item - java.util.ArrayList - and save.
3. Create a new Global Variable(s) file in the project.
4. Try to add a new global variable of the previously 'imported' type (java.util.ArrayList).

Actual results:
The type is not listed in the dropdown of available types/classes in the Add Global Variable pop-up.

Expected results:
The 'imported' type is available, global of that type can be added.

Additional info:
Building the project after adding the import suggestion didn't help.