TextEditor: Move comment definitions back to *Widget

Only used there, and avoids back-links to editors.

Change-Id: I81206057ce89d42aef7febb840cf9e44b869df0e
Reviewed-by: Christian Stenger <christian.stenger@digia.com>

src/libs/utils/uncommentselection.h

@@ -45,7 +45,7 @@ class QTCREATOR_UTILS_EXPORT CommentDefinition
 public:
     CommentDefinition();
 
-    enum Style { CppStyle, HashStyle };
+    enum Style { NoStyle, CppStyle, HashStyle };
     void setStyle(Style style);
 
     bool isValid() const;