I dont't think that if the option is changed the project should be rebuilded, it's good as it is.
Imagine you are debugging one file from a big project. Rebuild all is insane.
I'm aware of the space or whatever. But that would chage datetime attributte and sometimes we want to know when it really was edited.
A rebuild option there will be professional and very easy to do.
You know, just a remove(file) then point to build already there in the scoope.
Come on guys, less than 5 minutes to implement.
I could do it but then have to do it again everytime I update svn.
Like to work with the latest
Regards