logic: Fixed refreshing when source paths were removed

* Define exit state for TaskRepeatWhileSuccess
* Added TaskFinishParsing to end of parsing task sequence
* Also measure time spend clearing files in total index time

src/lib/data/TaskCleanStorage.h

@@ -5,6 +5,7 @@
 
 #include "utility/file/FilePath.h"
 #include "utility/scheduling/Task.h"
+#include "utility/TimePoint.h"
 
 class DialogView;
 class PersistentStorage;
@@ -28,6 +29,8 @@ private:
 	PersistentStorage* m_storage;
 	std::vector<FilePath> m_filePaths;
 	DialogView* m_dialogView;
+
+	TimePoint m_start;
 };
 
 #endif // TASK_CLEAN_STORAGE_H