logic: Ask user before reparsing the project

While the message box with the question is visible the ui is blocked. A message appears when:
* when project was edited
* when preferences were edited
* when project file has more recent changes than db
* when db has a different version than Coati

src/lib/settings/ApplicationSettings.h

@@ -10,8 +10,11 @@ class ApplicationSettings
 {
 public:
 	static std::shared_ptr<ApplicationSettings> getInstance();
+	ApplicationSettings();
 	~ApplicationSettings();
 
+	bool operator==(const ApplicationSettings& other) const;
+
 	int getMaxRecentProjectsCount() const;
 
 	// source
@@ -77,7 +80,6 @@ public:
 	void setLicenseCheck(const std::string& hash);
 
 private:
-	ApplicationSettings();
 	ApplicationSettings(const ApplicationSettings&);
 	void operator=(const ApplicationSettings&);