made some changes to how the mixer chooses the mixer to use base don the override type. Not sure if it's correct or good, but I'm saving the changes in case we come back to it later

Author: M1tchM355

src/mixer.cpp

@@ -635,6 +635,13 @@ void Mixer::select_primary_or_secondary_mixer()
     mixer_to_use_.u[3] = &secondary_mixer_.u[3];
     mixer_to_use_.u[4] = &secondary_mixer_.u[4];
     mixer_to_use_.u[5] = &secondary_mixer_.u[5];
+
+  for (uint8_t i = 0; i < NUM_MIXER_OUTPUTS; i++) { // Go through each row of the mixing matrix
+    if (primary_mixer_.override_type[i] == override_type_t.THR || primary_mixer_.override_type[i] == override_type_t.ATT) {
+      mixer_to_use_.u[i] = &primary_mixer_.u[i];
+    } else {
+      mixer_to_use_.u[i] = &secondary_mixer_.u[i];
+    }
   }
 }