[TxMt] drawer scrolling (bug/suggestion)

[Caio Chassot]

Hi,

The project drawer usually responds to horiontal scroll wheel moves, 
which is of great aid when you're working on a sub-sub-sub-sub dir and 
still trying to fit the editor in an ibook screen.

When a vertical scrollbar appears, though, the horizontal scroll whell 
stops working.

I suggest that you either a horizontal scrollbar is added when needed, 
or that the drawer always responds to the horizontal scroll wheel, even 
when the vertical scrollbar appears.