fix(ui): fixed threshold check bug that wouldn't allow threshold checks to be created where fields had spaces in them

[asalem1]

Closes #17129

Problem

API could not handle spaces in field names

Solution

Updated the ast.MemberExpression Property to be a string rather than ast.Identifier so that we forced properties to bracket notation instead of dot notation (which was the cause of the error)

• CHANGELOG.md updated with a link to the PR (not the Issue)

[drdelambre]

does typing in a flux query with r.beans instead of r.["beans"] still work when initiated from the client side?

[asalem1]

does typing in a flux query with r.beans instead of r.["beans"] still work when initiated from the client side?

Yup.

[drdelambre]

go nuts