Simple UserOperationLog table.

src/log/UserOperationLog.h

@@ -50,8 +50,16 @@ public:
         static UserOperationLog d;
         return &d;
     }
+    static void cleanHistoryLog();
+
+    static QStringList getHistoryLogFiles();
+
     void log(UserOperation operation, bool processing = false);
     void reloadFile();
+    QString currentLogFile(){
+        return currentFileName;
+    }
+    static void loadLogFromFile(QString filePath, QStringList& result);
 private:
     QString currentFileName;
     QFile logFile;