Undo parts of modernization

This amends f6943a712a.

While 1 is definitely a more positive value than -1 it ill-affects
the user experience of inveterate naysayer.

Change-Id: I89be50e13d3a6a6e8103042bb2e24069010eecd0
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/libs/utils/link.h

@@ -49,7 +49,7 @@ struct Link
     bool operator==(const Link &other) const
     { return linkTextStart == other.linkTextStart && linkTextEnd == other.linkTextEnd; }
 
-    int linkTextStart = 1;
+    int linkTextStart = -1;
     int linkTextEnd = -1;
 
     QString targetFileName;