[TxMt] Automatically make document a tab, if saved in project's directory

When I have directory open (in drawer) with files I work on, I create new document with cmd+N (I'm too lazy and forgetful to hit Cmd+Shift+N ;). When I save this document in project's directory, it remains open in TM as an individual file, with it's own window. Even if I open the same file by clicking in drawer, separate window remains separate and I end up same document in both tab and window.

Is it possible to automatically "tabify" documents when they're saved in a directory that's visible in drawer of some open project? "Open" command does that already.