Accordian _clickHandler stops Propagation

Accordian _clickHandler stops Propagation

Accordian _clickHandler stops Propagation, Why?
I cannot seem to find the reasoning why this function returns false.
I have modified it in 1.7.2.min so it returns this and everything
seems to work fine.
Example of why...
I did this so that I could have a nested list of categories with
checkboxs in the headers.
If there is no specific reason for returning false, could it be
updated to return this.
Thanks.
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