Give non-ASCII name either to a new project name
or to a project directory name, glade will
name its program name and project file name like 
"foo---bar" and "foo---bar.glade". It seems that
this iself is a intended feature, so it might be
okay.

However, it is possible to type non-ASCII
characters directly to the program name and
project filename text entries. This is confusing.
Shouldn't glade check and disable non-ASCII characters directly given onto
these text entries?

Also in this case, the files to be saved in the project directory has UTF-8
encoded filenames, 
regardless of locales. I'm not sure if this is
intended or not. If it is intended, we should
use locale encoded filenames especially when 
G_BROKEN_FILENAMES=1 environment variable is set.