ILS flight phase logic amended. When no ILS Frequency signal is available, the last contiguous section of valid ILS Localizer signal is used, not the entire approach phase.  (Refer to flight 6861790 for example of this problem).
Merge branch 'master' of https://github.com/FlightDataServices/FlightDataAnalyzer
Merge branch 'master' of https://github.com/FlightDataServices/FlightDataAnalyzer