Avoid Telemetry Lost / Telemetry Recovered voice alerts playing back to back when using the Reset Telemetry / Flight functions
Reinstate A2 alarms in D16 mode for the 3rd party adapter
A2 was also disabled in custom switches in D16 mode
Fixed problem on Linux. Hopfully did not break Windows.
Merge pull request #505 from opentx/dvogonen/companion_splash_problem_504

Fixed #504.
Merge branch 'origin/next'
Removed old graphics.
Created scalable version of the Companion logo.
Regenerated icons for Windows and Linux.