Fixes for valgrind-callgrind feedback by Nokia

Most changes include style fixes and UI changes for better usability.

Merge-request: 324
Reviewed-by: hjk <qtc-committer@nokia.com>

src/plugins/callgrind/callgrindvisualisation.h

@@ -66,6 +66,8 @@ public:
     void setFunction(const Valgrind::Callgrind::Function *function);
     const Valgrind::Callgrind::Function *function() const;
 
+    void setMinimumInclusiveCostRatio(double ratio);
+
 public slots:
     void setText(const QString &message);