Fixes latexballons icon update problem and the infinite burst issue.

* Fixes latexballons icon update problem and the infinite burst issue. 
* Blowing it now requires to attack the balloon with a tank not the other way around. 
* Adding a message when you blow up the latexballoon. 
* You can burst the balloon with a hot weapon like a lit lighter (is_hot() items)

Fixes #5329