Exclude some files from the "Tabs to space" feature

Hello,

I activated the "tabs to space" feature for my source code, for the sake of clean diff.
The caveat of this feature is that it is doing this replacements in my Makefiles as well (when I edit them in QTCreator).
Since the Makefile needs tabs, it messes up the building system.

I used Eclipse a lot with its plugin "AnyEdit" which has the same "tabs to space" feature, but enhanced with a filter of filenames that are excluded from this replacement (and prefilled with "Makefile").

I think it would be a good idea to add this kind of feature to the "tabs to space" function

I attached the eclipse AnyEdit pref pane for illustration.