Display Altitude on Main Screen

[CoryFoy]

Is your feature request related to a problem? Please describe.
While TAK Tracker sends the altitude as part of the CoT message, it is not displayed to the end user on the Main Screen

Describe the solution you'd like
Display Altitude on the main screen as it does on the Android TAK Tracker

Additional context
Altitude is not always displayed on TAK Tracker. For example, on the S10 it is not displayed as seen here. So it's likely a "display if there is room" context. Also note that like the other display elements the user can toggle between units - here Meters and Feet