Default `application_home` is not a good general choice

[Corran Webster]

The name of the application is selected by looking at the enclosing directory of the main script:

traits/traits/etsconfig/etsconfig.py

Lines 361 to 383 in 66b57b7

     def _get_application_dirname(self): 
         """ 
         Return the name of the directory (not a path) that the "main" 
         Python script which started this process resides in, or "" if it could 
         not be determined or is not appropriate. 
  
         For example, if the script that started the current process was named 
         "run.py" in a directory named "foo", and was launched with "python 
         run.py", the name "foo" would be returned (this assumes the directory 
         name is the name of the app, which seems to be as good of an assumption 
         as any). 
  
         """ 
  
         dirname = "" 
  
         main_mod = sys.modules.get("__main__", None) 
         if main_mod is not None: 
             if hasattr(main_mod, "__file__"): 
                 main_mod_file = path.abspath(main_mod.__file__) 
                 dirname = path.basename(path.dirname(main_mod_file)) 
  
         return dirname 

This is often something generic, like app, or when being run in tests is likely to be the name of the test runner (eg. unittest).

The only way to override is to completely override application_home.

Having a property that can be set for the directory name would be very useful.