For my builds in Project Properties I usually tick "Clear build window".
But sometimes I inadvertently start a new build while a previous build hasn't finished.
This causes the build window to clear immediately and the previous build continues.
I would like that the window is not cleared until the previous build finishes and the next build actually starts.
Another alternative is that if I do this, give the option to pop up a dialog with a warning "Previous build not finished yet".