feat(rum-explorer): improve UI perf

[kptdobe]

Before:

• https://www.aem.live/tools/rum/explorer.html?domain=www.adobe.com&filter=&view=year&checkpoint=click&domainkey=9A3B022A-4C58-4060-A76E-04DD0E70F1D0
• full ui updated in 1407ms

After

• https://perf--helix-website--adobe.aem.live/tools/rum/explorer.html?domain=www.adobe.com&filter=&view=year&checkpoint=click&domainkey=9A3B022A-4C58-4060-A76E-04DD0E70F1D0
• full ui updated in 420ms

Original

• https://original-explorer--helix-website--adobe.aem.live/tools/rum/explorer.html?domain=www.adobe.com&filter=&view=year&checkpoint=click&domainkey=9A3B022A-4C58-4060-A76E-04DD0E70F1D0
• full ui updated in 231ms

Nice improvement but still work to be done to be back to original speed!

[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

* [d33724c](https://github.com/adobe/helix-website/commit/d33724c2b816e6f229bf5f49be7afa3009842988) :white_check_mark: (latest) * [31fcd41](https://github.com/adobe/helix-website/commit/31fcd41597d92b0bba13446a04c99838e136fcbd) :white_check_mark: * [d86dc06](https://github.com/adobe/helix-website/commit/d86dc0648b420cfe9efae659e2ebb80e068916c6) :white_check_mark:

[aem-code-sync[bot]]

Page	Scores	Audits	Google
/tools/rum/explorer.html?domain=www.adobe.com&filter=&view=year&checkpoint=click &domainkey=9A3B022A-4C58-4060-A76E-04DD0E70F1D0