ProjectExplorer: Add possibility to keep link visible

Added possibility to keep link to global settings visible when
checkbox is invisible.

Change-Id: I724f1c1997b640b2277c4004acd24d5f6cca9faa
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/projectexplorer/codestylesettingspropertiespage.cpp

@@ -38,6 +38,7 @@ CodeStyleSettingsWidget::CodeStyleSettingsWidget(Project *project) : ProjectSett
 {
     m_ui.setupUi(this);
     setUseGlobalSettingsCheckBoxVisible(false);
+    setUseGlobalSettingsLabelVisible(false);
 
     const EditorConfiguration *config = m_project->editorConfiguration();