hack to ge round un-highlihgt

ive used a pattern that will never be found so that the highlight effect will remove the span it put in originally.

When the highlight effect fires it creates essentially a new object that is made up sub text
elements. Either we need a way to be able to undo this from the original effect, or a new way
to change the color of part of the text alone from everything else.

for now searching for a string that cant be found will replace the text label with a new version with no spans in it.