logic: maven project setup

* added option to create a Coati project from a Maven POM file
* show list of indexed file paths in maven project setup
* use FileManager to detect indexed files in project setup (except cdb)
* added Maven path to preferences window and added path detectors.
* fixed: QtDialogView::hideStatusDialog now also hides loader in status bar.
* refactored ProjectType

fortune cookie message = If you continually give, you will continually have.

src/lib/Application.cpp

@@ -130,6 +130,16 @@ int Application::handleDialog(const std::string& message, const std::vector<std:
 	return getDialogView()->confirm(message, options);
 }
 
+std::shared_ptr<DialogView> Application::getDialogView()
+{
+	if (m_componentManager)
+	{
+		return m_componentManager->getDialogView();
+	}
+
+	return std::shared_ptr<DialogView>();
+}
+
 bool Application::isInTrial() const
 {
 	return m_isInTrial;
@@ -303,17 +313,6 @@ void Application::updateRecentProjects(const FilePath& projectSettingsFilePath)
 	}
 }
 
-DialogView* Application::getDialogView() const
-{
-	if (m_componentManager)
-	{
-		return m_componentManager->getDialogView();
-	}
-
-	static DialogView dialogView(nullptr);
-	return &dialogView;
-}
-
 void Application::logStorageStats() const
 {
 	if (!ApplicationSettings::getInstance()->getLoggingEnabled())