Thanks for the effort, guys.
Sadly this doesn't really help.
Seems to me as more inconvenient to have to move to the desired folder every time.
What bugs me the most is, that one can't click save and then immediately start typing the filename, in the way that the whole line (including ".xxx")is highlighted.
Since there might be some not really intelligent people handling this, I would love a way for them to immediately start typing, but still have the right extension visible as well.
Do I have to file a bug-report to get this in or is there nothing one can do to try and get functionality of the filetype selector!?