... Sometimes it could be helpful to define Editor Settings depending on the File Type.

For example:

Makefiles use <tab> Characters. (We uses Gnu Make to translate our lessc Files).
.php Files expand <tab> to 4 <space>es.

Greetings
Eutychus

I'ts already possible in a flexible way. What you need is .editorconfig
It's fully supported in v18. See http://editorconfig.org/ for further details

Oh, that's cool.

When is .editorconfig file reloaded? Once after loading a Project or Workspace?

a file? There could be many. For example if you open c:\myproject\js\something\something2\filename.txt, it will try to find .editorconfig in all parent subdirectories:
c:\myproject\js\something\something2\
c:\myproject\js\something\
c:\myproject\js\
c:\myproject\
until root = true is found
and each particular property can be defined in any of them, or in them all.

.editorconfig files are checked each time you open a file