TTS: display status bar error if no .wav file is generated (K3CT) (Coded by N1MM)

TTS: TTSTrim was broken (N2IC) (Coded by N1MM)

Added {EXCHSENT} macro. This is useful when you want to have an alternate way to send call+exchange. For example, when using TTS, your normal Enter key F5+F2 may send the call phonetically, but you want an alternative way to send the call and exchange, without the call being sent phonetically. An example is F8 Call_exc,{TTS {SPACECALL}. FIVE nine 4}{EXCHSENT}

Experimental: added {TTSParms speed,noise_w,noise_scale} macro to allow setting of TTS_Speed, Piper noise_w and Piper noise_scale parameters. The are in effect until changed (Coded by N1MM)