Fix failsafe bug: Show return altitude field for fixed altitude mode on first load (#4629)

* Initial plan

* Fix failsafe bug: Show return altitude field for fixed altitude mode on first load

Co-authored-by: nerdCopter <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: nerdCopter <[email protected]>

Author: Copilot

src/js/tabs/failsafe.js

@@ -323,7 +323,6 @@ failsafe.initialize = function (callback) {
                 altitude_number_field.hide();
             }
         }
-        showReturnAlt();
         $("#failsafeGpsRescueItemAltitudeSelect").on("change", showReturnAlt);
 
         // Introduced in 1.43
@@ -332,6 +331,9 @@ failsafe.initialize = function (callback) {
         $('input[name="gps_rescue_allow_arming_without_fix"]').prop("checked", FC.GPS_RESCUE.allowArmingWithoutFix > 0);
         $('select[name="gps_rescue_altitude_mode"]').val(FC.GPS_RESCUE.altitudeMode);
 
+        // Call showReturnAlt after the altitude mode value is set
+        showReturnAlt();
+
         // Introduced in 1.44
         $('input[name="gps_rescue_min_start_dist"]').val(FC.GPS_RESCUE.minStartDistM);