CREATOR: SSR and Shadow-Dom compatibility

[dmitry-kurmanov]

https://github.com/surveyjs/private-tasks/issues/512

[bobslee]

@dmitry-kurmanov Is this PR related to a SVC (creator) issue in a Shadow DOM?
The Toolbox search doesn't work in a Shadow DOM.
In case this PR isn't related I will submit an issue with an example.

[dmitry-kurmanov]

@dmitry-kurmanov Is this PR related to a SVC (creator) issue in a Shadow DOM? The Toolbox search doesn't work in a Shadow DOM. In case this PR isn't related I will submit an issue with an example.

@bobslee Thanks for your contribution, and yes, you are right! This PR about all parts of the Creator support for rendering within Shadow DOM (as we did for the Library) for the Creator, including the Toolbox. I am going to check your issue about toolbox as soon as possible and include the fix in this PR.

[bobslee]

@dmitry-kurmanov Excellent, I'm looking forward.
Thanks in advance!