Missing visual location of alert on all nodes after alert is issued other than RWY

[github768484]

There is no visual location of of an alert once issued. One would expect the alert to be accompanied by a visual location of the aircraft. The only indication of location is limited to the RWYs and not TWYs or off pavement areas. TWYs or off pavement areas need a visual indication of aircraft location.

[Jonmccombs]

Stage 1 and Stage 2 are intended for arriving aircraft so they will only be using runway for arrival. Stage 3 allows you to select any location on map since aircraft go travel to any location. An expected condition would be to issue a Stage 2 (emergency in flight) then issue and update to Stage 3 once aircraft has been determined that it crashed or left the runway expected.

[github768484]

Stage 1 and Stage 2 alerts can happen just about anywhere one the airfield. i.e. Smoke reported in cockpit while on the ramp or engine fire on TWY C.

[github768484]

We need to issue an alert 1,2,3 at any location on the map