Edited Unassigned: Memory leak in HtmlControl [9057]

If you are setting different HTML pages as Text to HtmlControl then it saves references to some CSS elements.

I found that full reference is:

```
HtmlControl -> _htmlContainer -> _htmlContainerInt -> _hoverBoxes
```

_hoverBoxes contains a lot of references and never cleared (at least in 1.5 release).

It would be nice to have an ability to clear this array.