[TxMt] UI suggestion for tabbed file names

[Christopher Creutzig]

Dave Baldwin wrote:

> I don't think the correspondence of dot and cross to edited and un- 
> edited is obvious or natural and it would be better to no show any  

 Actually, I think it's obvious, given that the red close button in all
OS X apps behaves the same way.  (Except you only get the cross when
moving the mouse pointer near it.)

Regards,
	Christopher