Comment 65 for bug 239462

There has been some discussion about the flag controlling what to do with the tooltip, started by me in comments #16 and #18, and more recently in comments #54, #57 and #60.

I like the suggestion in #57 about using IsPopupOpen instead of a separately maintained flag that duplicates (and possibly mis-duplicates) the effect of IsPopupOpen. Is it worth adopting IsPopupOpen (and stripping out mTooltipshown) to simplify things here?

[I say this without fully understanding what IsPopupOpen is, but assume it to be a routine that returns the display status of a given pop-up.]