chore: highlight focus if selected from URL query param

[davidnuescheler]

https://www.aem.live/tools/rum/explorer.html?domain=emigrationbrewing.com&filter=&view=year&focus=lcp&domainkey=

vs.

https://rum-explorer-focus--helix-website--adobe.aem.page/tools/rum/explorer.html?domain=emigrationbrewing.com&filter=&view=year&focus=lcp&domainkey=

[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.

• [ ] Re-run PSI checks
• [ ] Re-sync branch

Commits

* [54f5f79](https://github.com/adobe/helix-website/commit/54f5f796d47b6540ff274284e535e6d894653940) :white_check_mark: (latest)

[aem-code-sync[bot]]

Page	Scores	Audits	Google
/tools/rum/explorer.html?domain=emigrationbrewing.com&filter=&view=year&focus=lc p&domainkey=