Update fc.js

Changed logic to allow the D to be editable for airplanes. This is for the new PIDFF update.

js/fc.js

@@ -71,7 +71,7 @@ var FC = {
         return (MIXER_CONFIG.platformType == PLATFORM_AIRPLANE || MIXER_CONFIG.platformType == PLATFORM_ROVER || MIXER_CONFIG.platformType == PLATFORM_BOAT) || ((MIXER_CONFIG.platformType == PLATFORM_MULTIROTOR || MIXER_CONFIG.platformType == PLATFORM_TRICOPTER) && semver.gte(CONFIG.flightControllerVersion, "2.6.0"));
     },
     isRpyDComponentUsed: function () {
-        return MIXER_CONFIG.platformType == PLATFORM_MULTIROTOR || MIXER_CONFIG.platformType == PLATFORM_TRICOPTER;
+        return MIXER_CONFIG.platformType == PLATFORM_AIRPLANE || MIXER_CONFIG.platformType == PLATFORM_MULTIROTOR || MIXER_CONFIG.platformType == PLATFORM_TRICOPTER;
     },
     isCdComponentUsed: function () {
         return FC.isRpyDComponentUsed();