Scroll beyond the visible plots in the matplotlib view

# Feature Description

**Aim to not delete parts of the template.**

[comment]: <> (FILL IN BELOW)
As a user, I would like to be able to scroll back beyond just the visible plots in the matplotlib view.~~~

## Explanation
As a user, I would like to be able to scroll back beyond just the visible plots in the matplotlib view.

[comment]: <> (FILL IN BELOW)

### Additional Information

As a user, I would like to be able to scroll back beyond just the visible plots in the matplotlib view.

- _Where required files/links are_
- _Describe any potential difficulties with this ticket_
- _Provide links to tickets that must be completed before starting_
- _Provide any images that would be relevant to the ticket_

_{_If not applicable, write "Not applicable"_}

[comment]: <> (FILL IN BELOW)
> ...

_{See our [Git Workflow](https://github.com/ISISComputingGroup/ibex_developers_manual/wiki/Git-workflow#development-work).}

# Acceptance Criteria
_{What is the acceptance criteria of this ticket? What should the reviewer expect to be complete?}
- _Define specific conditions that must be met for the feature to be considered complete_
- _Use bullet points for clarity_
- _Ensure each criterion is unique, testable and verifiable_
- [ ] I would like to be able to scroll back beyond just the visible plots in the matplotlib view.

[comment]: <> (FILL IN BELOW)
> ...

# How to Review
_{Before making a PR...}
- _Provide verbose instructions for the reviewer to test your changes_
- _Describe how you have implemented testing for this feature_
- _Provide screenshots of the feature to help the reviewer if relevant_
Check that I can scroll back beyond just the visible plots in the matplotlib view.

_{_If not applicable, write "Not applicable"_}

[comment]: <> (FILL IN BELOW)
> ...

_{**To the reviewer: Make sure to [update submodules](https://github.com/ISISComputingGroup/ibex_developers_manual/wiki/Git-workflow#reviewing-work-for-the-submodules-of-epics)!**}