add FEATURE: edit cars and drivers

datahelper.cpp

@@ -0,0 +1,13 @@
+#include "datahelper.h"
+
+DataHelper::DataHelper() {
+}
+
+QStringList DataHelper::vectorListToQstringList(vector<vector<QString>> list,
+                                                unsigned long index) {
+    QStringList qstrList;
+    for (auto row : list) {
+        qstrList << row.at(index);
+    }
+    return qstrList;
+}