Hi,
I know it's a bit late, but it is possible for it to be a ballon pop-up.
In _ToolTip.js replace
code:
var TTS_NOPREFIX = 0x2;
with
code:
var TTS_NOPREFIX = 64;
note that this is definitely a hack but it'll work. If you really feel the need to, make a new variable
code:
var TTS_BALLOON = 64;
and replace every instance of TTS_NOPREFIX with TTS_BALLOON instead.