added buttons to template picker

[DriftingSands]

Added next/prev buttons to template selector to more clearly indicate that more templates exist

[aem-code-sync[bot]]

Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch and validate page speed. In case there are problems, just click a checkbox below to rerun the respective action.

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Commits

* [5acc720](https://github.com/headwire-edge-delivery/eds-self-service-website/commit/5acc7204542916842d61f6f9e97e13a31aca43c9) :white_check_mark: (latest) * [03cccc9](https://github.com/headwire-edge-delivery/eds-self-service-website/commit/03cccc96c0e7eaff7c9128fb9abbf0cf5c8c5bd6) :white_check_mark:

[icaraps]

Can you also hide the scrollbar and make the buttons round (ie same height as width and border-radius: 50%) ?