Fix hx-live take to default to sibling scope

[MichaelWest22]

Description

Recent improvements to hx-live have changed the default scope behavior of the take helper. It now defaults to take from the whole page which could be a risky default. The normal take case is to take a class or selection etc from your siblings in a list so it defaults to searching for the class inside the parentElement and removing the class from here and placing it on the selected element. So I've reverted to this old behavior which I think makes more sense.

Corresponding issue:

Testing

Added tests for the default take from sibling case and removed the default from whole page test.

Checklist

• I have read the contribution guidelines
• I have targeted this PR against the correct branch (master for website changes, dev for
  source changes)
• This is either a bugfix, a documentation update, or a new feature that has been explicitly
  approved via an issue
• I ran the test suite locally (npm run test) and verified that it succeeded