ProjectExplorer: Add a common template for project settings

- Added base widget class for common options among project settings tabs
- Added usage new template class to all pages used in project settings

ToDo
- Make CodeStyle tab standardized

Change-Id: I8f70413b6ee764c5e43fbeae104b9389237c582f
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/projectexplorer/codestylesettingspropertiespage.cpp

@@ -34,9 +34,10 @@ using namespace TextEditor;
 using namespace ProjectExplorer;
 using namespace ProjectExplorer::Internal;
 
-CodeStyleSettingsWidget::CodeStyleSettingsWidget(Project *project) : QWidget(), m_project(project)
+CodeStyleSettingsWidget::CodeStyleSettingsWidget(Project *project) : ProjectSettingsWidget(), m_project(project)
 {
     m_ui.setupUi(this);
+    setUseGlobalSettingsCheckBoxVisible(false);
 
     const EditorConfiguration *config = m_project->editorConfiguration();