ClangFormat: Fix unsaving properties for global settings

- Fixed behavior "Formatting mode" combobox settings isn't
saved after pressing "Ok" button when no one project is
open. Now it works as expected, settings save after press
"Ok" button.
- Added additional applying interface for ICodeStylePreferenceFactory
which allows pass-through apply call from dialog to the editor.

Note: it doesn't work with read-only code style profiles

Change-Id: If4f0c85e3105550db4ffd9860e94b678f0d9b386
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/nim/settings/nimcodestylepreferenceswidget.cpp

@@ -44,7 +44,7 @@ using namespace TextEditor;
 namespace Nim {
 
 NimCodeStylePreferencesWidget::NimCodeStylePreferencesWidget(ICodeStylePreferences *preferences, QWidget *parent)
-    : QWidget(parent)
+    : TextEditor::CodeStyleEditorWidget(parent)
     , m_preferences(preferences)
     , m_ui(new Ui::NimCodeStylePreferencesWidget())
 {