Running queries via dbus

[Jacopo De Simoi]

I just got a quite crazy idea; it might work though. 
Since we are making the thread stall by waiting for the async reply we could as well check that while we get the pending reply the context is still valid and bail out discarding the reply otherwise. If this can be coded in a simple way I guess it's a good solution for preventing stacking up of threads in krunner
Aaron ,what do you think about this?

Thanks 

 __J