ClangFormat: Fix applying global settings

The actual apply() method was never called for the widget.

Change-Id: Idff194a36591db437cbe5695377005ed5a0b25d4
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/texteditor/icodestylepreferencesfactory.cpp

@@ -34,8 +34,8 @@ ICodeStylePreferencesFactory::ICodeStylePreferencesFactory(QObject *parent) :
 {
 }
 
-QWidget *ICodeStylePreferencesFactory::createCodeStyleEditor(ICodeStylePreferences *codeStyle,
-                                                             QWidget *parent)
+CodeStyleEditorWidget *ICodeStylePreferencesFactory::createCodeStyleEditor(
+    ICodeStylePreferences *codeStyle, QWidget *parent)
 {
     return new CodeStyleEditor(this, codeStyle, parent);
 }