ClangFormat: Move override checkbox to global settings

Moved override checkbox to global settings groupbox.

Change-Id: I70c97486a61f69274d059edc5095fe02c86fb04d
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/clangformat/clangformatglobalconfigwidget.h

@@ -52,11 +52,18 @@ public:
 private:
     void initCheckBoxes();
     void initIndentationOrFormattingCombobox();
+    void initOverrideCheckBox();
 
+    bool projectClangFormatFileExists();
+
+    ProjectExplorer::Project *m_project;
+
+    QLabel *m_projectHasClangFormat;
     QLabel *m_formattingModeLabel;
     QComboBox *m_indentingOrFormatting;
     QCheckBox *m_formatWhileTyping;
     QCheckBox *m_formatOnSave;
+    QCheckBox *m_overrideDefault;
 };
 
 } // namespace ClangFormat