Added constraints to Away (Anti frost) mode for solaire_vitra_smart_heater_s2.yaml

In this mode the temperature is locked to 7C
Also changed order of Modes to match the order shown in the Smart Life app and on the display panel on the device itself

custom_components/tuya_local/devices/solaire_vitra_smart_heater_s2.yaml

@@ -21,6 +21,14 @@ primary_entity:
       range:
         min: 7
         max: 30
+      mapping:
+        - constraint: preset_mode
+          conditions:
+            - dps_val: "antifreezen"
+              value: 7
+              range:
+                min: 7
+                max: 7
     - id: 3
       name: current_temperature
       type: integer
@@ -31,10 +39,10 @@ primary_entity:
       name: preset_mode
       type: string
       mapping:
-        - dps_val: eco
-          value: eco
         - dps_val: comfort
           value: comfort
+        - dps_val: eco
+          value: eco
         - dps_val: antifreezen
           value: away
     - id: 12