SITES-16562 - [Xwalk] Open Universal Editor from Franklin Sidekick

[jckautzmann]

• adds a customized Edit button to the Sidekick to open the page with the Universal Editor
• hides the default buttons of the Sidekick

Fix SITES-16562

Test URLs:

• Before: https://main--aem-boilerplate-xwalk--jckautzmann.hlx.page/
• After: https://open-ue--aem-boilerplate-xwalk--jckautzmann.hlx.page/

Example:

[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

* [5c102d6](https://github.com/adobe-rnd/aem-boilerplate-xwalk/commit/5c102d6d6d559aa20bb802fe9cf4a440707944e6) :white_check_mark: (latest) * [8fd5333](https://github.com/adobe-rnd/aem-boilerplate-xwalk/commit/8fd5333b8d0d2074b0cad89dc3a3184be885f3e3) :white_check_mark: * [ce8a8b0](https://github.com/adobe-rnd/aem-boilerplate-xwalk/commit/ce8a8b0026f5e8ad013bf6db908a43ee2f95350d) :white_check_mark: * [4fb0ead](https://github.com/adobe-rnd/aem-boilerplate-xwalk/commit/4fb0ead3b1d0b7dbefeb6567b8b249c31463abd8) :white_check_mark:

[jckautzmann]

The aem-psi-check fails with the message:

Pull request description must include at least one preview url to the test project.
Please update the description.

although the description contains test URLs.