Clickable logo to return to overview

[jochemvandooren]

resolves #446

Description

Make the logo clickable, returning to the overview page.

Checklist

• I have read the contributing guide and understand what's expected of me
• I have signed the CLA
• I have run this code in development and it appears to resolve the stated issue
• I have opened an issue to add/update docs, or docs changes are not required/relevant for this PR
• I have run changie new to create a changelog entry

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[graciegoheen]

This is great! Super straightforward addition, and I confirmed it works when I tested locally. Thanks a ton for the contribution :)