mavlink-manual-control: Use already mapped functions slot backwards

In the case all the button slots are already taken, we try to change the last button slots first, as in the case of vehicles with 32 buttons available, we prevent changing the first 16, which are usually used by other ground control stations, preventing clashs.

src/libs/joystick/protocols/mavlink-manual-control.ts

@@ -565,7 +565,7 @@ export class MavlinkManualControlManager {
       } else {
         const mavlinkActionValue = this.vehicleButtonParameterTable.find((e) => e.title === actionId)
         if (mavlinkActionValue === undefined) return
-        this.vehicle?.setParameter({ id: unnecessaryVehicleRegularButtons[indexRegularButtonToUse].button, value: mavlinkActionValue.value })
+        this.vehicle?.setParameter({ id: unnecessaryVehicleRegularButtons[unnecessaryVehicleRegularButtons.length - 1].button, value: mavlinkActionValue.value })
       }
       indexRegularButtonToUse++
     })
@@ -578,7 +578,7 @@ export class MavlinkManualControlManager {
       } else {
         const mavlinkActionValue = this.vehicleButtonParameterTable.find((e) => e.title === actionId)
         if (mavlinkActionValue === undefined) return
-        this.vehicle?.setParameter({ id: unnecessaryVehicleShiftButtons[indexShiftButtonToUse].button, value: mavlinkActionValue.value })
+        this.vehicle?.setParameter({ id: unnecessaryVehicleShiftButtons[unnecessaryVehicleShiftButtons.length - 1].button, value: mavlinkActionValue.value })
       }
       indexShiftButtonToUse++
     })