Empty tab

[takeos]

When a tab which has no text and no associated file (e.g. open New, then you write something and then you cut it) some special treatment is desirable, namely:

- Do not show "*" in title
- Do not prompt for saving if closing the tab or application
- Allow drag and drop of new file to go to that tab, instead of opening a new tab

It's a minor refinement, but in the quality style of TextPad. Other applications behave in this way too, and it can save a lot of small annoyances.