Idf: file endings, normalize them and let git manage them

src/Mod/.gitattributes

@@ -51,6 +51,7 @@ JtReader    export-ignore
 # AddonManager/** -text
 # Arch/** -text
 # Draft/** -text
+# Idf/** -text
 # Fem/** -text
 # Material/** -text
 # OpenSCAD/** -text
@@ -61,14 +62,13 @@ JtReader    export-ignore
 # line endings of the modules NOT commented will NOT be normalized
 # Be carefully changes here could affect a lot of files automatically!
 
-# Complete, Idf makes sense to normalize
+# Complete makes sense to normalize
 
 Assembly/** -text
 Cam/** -text
 Cloud/** -text
 Complete/** -text
 Drawing/** -text
-Idf/** -text
 Image/** -text
 Import/** -text
 Inspection/** -text