Fix some issues with Kamaji extension

[aalves08]

This PR fixes some issues I've detected while doing tests with Rancher Extensions for the upcoming Rancher 2.9 release:

• a routing issue (hard refresh on product route wouldn’t work - fixes to product.ts and routes.ts)
• layout issue (sidebar disappears - removal of layout: "single" in Dashboard component)
• product name needs to be a single word like kamaji not multitenancy management
• updated shell package dependency to latest stable version
• fixes some linting issues
• version bumping to prepare for a release

To test:

• check out branch and yarn install dependencies
• do yarn build-pkg kamaji + yarn serve-pkgs to serve the locally built assets and then go to your Rancher instance and do a developer load
  https://extensions.rancher.io/extensions/extensions-getting-started#test-built-extension-by-doing-a-developer-load

Before

After

[aalves08]

@bsctl are there any extra changes besides bumping the version to 0.2.0 that you would like me to do?

[bsctl]

@aalves08

@bsctl are there any extra changes besides bumping the version to 0.2.0 that you would like me to do?

It should be fine, please bump to 0.2.0

[aalves08]

@bsctl @prometherion change done. Requesting final approval 🙏

[bsctl]

lgtm