Merge branch '2.3.0' into 2.3

# Conflicts:
#	CREDITS.txt
#	radio/src/telemetry/multi.cpp
#	tools/release23/tts.py
#	tools/release23/tts_common.py

radio/src/opentx.cpp

@@ -869,7 +869,10 @@ static void checkRTCBattery()
 void checkFailsafe()
 {
   for (int i=0; i<NUM_MODULES; i++) {
-    if (isModuleFailsafeAvailable(i)) {
+    if (isModuleMultimodule(i)) {
+      multiModuleStatus.requiresFailsafeCheck = true;
+    }
+    else if (isModuleFailsafeAvailable(i)) {
       ModuleData & moduleData = g_model.moduleData[i];
       if (moduleData.failsafeMode == FAILSAFE_NOT_SET) {
         ALERT(STR_FAILSAFEWARN, STR_NO_FAILSAFE, AU_ERROR);