Microphone tx is mostly working, Voice activation, PTT, CTCSS...

Transmit bandwidth bugfix
TX LED is now only lit when using rf amp
VU-meter widget
Added gain parameter for baseband audio TX

firmware/application/radio.cpp

@@ -141,6 +141,13 @@ bool set_tuning_frequency(const rf::Frequency frequency) {
 
 void set_rf_amp(const bool rf_amp) {
 	rf_path.set_rf_amp(rf_amp);
+	
+	if (direction == rf::Direction::Transmit) {
+		if (rf_amp)
+			led_tx.on();
+		else
+			led_tx.off();
+	}
 }
 
 void set_lna_gain(const int_fast8_t db) {