CodeStyle: Remove edit pop-up

Removed the Edit pop-up on the CodeStyle page.
Now editing is available immediately after opening
CodeStyle tab.
I left a preview on the project CodeStyle page and
added a link to global settings.

ToDo:
In project CodeStyle page replace preview with CodeStyleEditor.
I'm not 100% sure that it is needed. If you have some thoughts
please write a comment.

Change-Id: I31032a97b9668b4f6b06fc6c5c704700fb44ee4f
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/projectexplorer/codestylesettingspropertiespage.cpp

@@ -28,6 +28,8 @@
 #include "editorconfiguration.h"
 #include "project.h"
 
+#include <cppeditor/cppeditorconstants.h>
+
 #include <texteditor/texteditorsettings.h>
 #include <texteditor/icodestylepreferencesfactory.h>
 #include <texteditor/codestyleeditor.h>
@@ -48,8 +50,8 @@ CodeStyleSettingsWidget::CodeStyleSettingsWidget(Project *project)
     auto languageComboBox = new QComboBox(this);
     auto stackedWidget = new QStackedWidget(this);
 
+    setGlobalSettingsId(CppEditor::Constants::CPP_CODE_STYLE_SETTINGS_ID);
     setUseGlobalSettingsCheckBoxVisible(false);
-    setUseGlobalSettingsLabelVisible(false);
 
     const EditorConfiguration *config = project->editorConfiguration();