Fix TypeError in Comment Viewer by ensuring Job object is handled as …

…iterable

- Updated `viewComments` method in MenuActions.py to wrap single Job objects in a list.
- This prevents TypeError when attempting to iterate over a non-iterable Job object.

cuegui/cuegui/MenuActions.py

@@ -581,6 +581,8 @@ def dropInternalDependencies(self, rpcObjects=None):
     def viewComments(self, rpcObjects=None):
         jobs = self._getOnlyJobObjects(rpcObjects)
         if jobs:
+            if not isinstance(jobs, list):
+                jobs = [jobs]
             cuegui.Comments.CommentListDialog(jobs, self._caller).show()
 
     dependWizard_info = ["Dependency &Wizard...", None, "configure"]