Why does buildTeXString have a cursorColor property?

[garv-shah]

Bug description

node.buildTeXString() seems to have a cursorColor property, but it really shouldn't need one. All it does is append something like \textcolor{#000000}{\cursor} to the end of tex string, and it seems to break loading it back into the MathField document

To Reproduce

Steps to reproduce the behavior:
Get a MathFieldEditingController and call .currentNode.buildTexString() and try to load the string back in

Expected behavior

No cursorColor attribute, loading back in without changes

[garv-shah]

also it seems like parsing it back in adds brackets every time to the end, is that intended behaviour?