[Qt-creator] Switching project automatically

[Li Lirong]

Hi,

Before qtcreator 2.0, the current project was switched whenever the
active file is switched.  This is handy because I can always "Ctrl +
B" to build the project that contains the files I am currently
editing.  Now in qtcreator 2.0, I have to manually change the project
with several mouse clicks.  Is it possible to bring back the old
behavior of switching project back in 2.0?

Best regards,
Lirong