CFF & Rebel.NET Update

Fixed some bugs in both applications.
In particular, made some part of the CFF Explorer more robust. The current CFF Explorer still contains the core I wrote when I was 19yo. The newer kernel, which I don’t know if I’ll ever get the time to finish, doesn’t have the same problems. Anyway, this should improve rebuilding, resources importing and displaying of .NET table elements with extremely long names (more than 4096 characters).