ui: added info screen for indexer crash investigation

* in case Coati crashes while indexing this screen will inform the user of further steps to take in order to find out what happened

src/lib/settings/ApplicationSettings.cpp

@@ -175,6 +175,16 @@ void ApplicationSettings::setVerboseIndexerLoggingEnabled(bool value)
 	setValue<bool>("application/verbose_indexer_logging_enabled", value);
 }
 
+std::vector<FilePath> ApplicationSettings::getIndexingFilePaths() const
+{
+	return getPathValues("application/state/indexing_paths/indexing_path");
+}
+
+bool ApplicationSettings::setIndexingFilePaths(const std::vector<FilePath>& indexingFiles)
+{
+	return setPathValues("application/state/indexing_paths/indexing_path", indexingFiles);
+}
+
 int ApplicationSettings::getIndexerThreadCount() const
 {
 	return getValue<int>("indexing/indexer_thread_count", 4);

src/lib/settings/ApplicationSettings.h

@@ -53,6 +53,9 @@ public:
 	bool getVerboseIndexerLoggingEnabled() const;
 	void setVerboseIndexerLoggingEnabled(bool loggingEnabled);
 
+	std::vector<FilePath> getIndexingFilePaths() const;
+	bool setIndexingFilePaths(const std::vector<FilePath>& indexingFiles);
+
 	// indexing
 	int getIndexerThreadCount() const;
 	void setIndexerThreadCount(const int count);