private void ApplySettings()
{
var signals = AllSignals.DefaultSignals;
signals.Clear();
foreach (DataRow row in MyData.Tables["Measurements"].Rows)
signals.Add(new SignalBook(row));
var terminal = AllSignalGroups.DefaultSignalGroups;
terminal.Clear();
foreach (DataRow row in MyData.Tables["Terminals"].Rows)
terminal.Add(new SignalGroupBook(row));
}