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.cpp

@@ -1,6 +1,7 @@
 #include "settings/ApplicationSettings.h"
 
 #include "utility/ResourcePaths.h"
+#include "utility/utility.h"
 
 std::shared_ptr<ApplicationSettings> ApplicationSettings::s_instance;
 
@@ -14,10 +15,21 @@ std::shared_ptr<ApplicationSettings> ApplicationSettings::getInstance()
 	return s_instance;
 }
 
+ApplicationSettings::ApplicationSettings()
+{
+}
+
 ApplicationSettings::~ApplicationSettings()
 {
 }
 
+bool ApplicationSettings::operator==(const ApplicationSettings& other) const
+{
+	return
+		utility::isPermutation<FilePath>(getHeaderSearchPaths(), other.getHeaderSearchPaths()) &&
+		utility::isPermutation<FilePath>(getFrameworkSearchPaths(), other.getFrameworkSearchPaths());
+}
+
 int ApplicationSettings::getMaxRecentProjectsCount() const
 {
 	return 7;
@@ -161,10 +173,6 @@ void ApplicationSettings::setCodeSnippetExpandRange(int range)
 	setValue<int>("code/snippet/expand_range", range);
 }
 
-ApplicationSettings::ApplicationSettings()
-{
-}
-
 std::vector<FilePath> ApplicationSettings::getRecentProjects() const
 {
 	std::vector<FilePath> recentProjects;