Fix/iterator

[KvantOrav]

ITERATOR FIX

Description

Allows TopicCycle().queue_last() and BannerCycle().queue_last() to be used like so, instead of self.topics_cycle or self.banner_cycle.

Purpose

Fixes the issue where StopIteration would be raised after updating topic or banner lists.

Checklist

• [x] This PR makes changes to the code
  • [x] I have tested my changes locally and they work as expected.
  • [ ] I have ensured that the code is free of linting errors and warnings.
  • [ ] I have added any necessary comments or explanations to the code.
  • [ ] I have updated the documentation (if applicable) to reflect the changes.
• [x] This PR fixes an issue.
• [ ] This PR adds something new
• [ ] This PR is a breaking change (e.g. methods or parameters removed/renamed)
• [ ] This PR is not a code change (e.g. documentation, README, ...)