get rid of csp-module and implement secure-renderer

[rommelfreddy]

hello @jissereitsma

you used your CSP module to implement the nonce for inline-js.

But as already discussed https://github.com/yireo/Yireo_CspWhitelistInlineJs/issues/1 the module is great, but it is only a temporary solution for production.

Each extension developer should implement the secure-renderer to use inline-scripts. also Yireo :)

And then we do not need the separate extension. I don't think it is a good idea to implement the separate extension in all shops automatically, because some shops won't have the extension.

So i hope you understand me, and will approve the PR :)

Thank you!