*) Highlight current frequency in the frequency list.
+ Placed current frequency in title bar
+
*) Random frequency selection. Provide some mechanism to input
arbitrary radio frequencies. Could be like AltosUI which allows
you to edit the list of frequencies and assign names to them,
*) Remember most-recently-used TBT and frequency, perhaps
auto-connect at startup.
+
+ Done
*) Re-loading flight data from .telem file to get back to
'find my rocket' mode after shutting down the application.
+ Done
+
*) Imperial Units mode
+
+ Done
+
+ *) TeleBT battery voltage