Fix hvac_action indication icons (#865)

* Fix `hvac_action` indication icons

Fix for pages home and climate.
This should remove the need for all the 25~30 instances of hot water in the code.

* Update nspanel_esphome.yaml

nspanel_esphome.yaml

@@ -320,6 +320,7 @@ api:
         total_steps: int
         slider_val: int
         temp_offset: int
+        climate_icon: string
       then:
         - wait_until:
             binary_sensor.is_on: nextion_init
@@ -328,6 +329,7 @@ api:
               {
                 id(disp1).set_component_value("climateslider", slider_val);
                 id(disp1).set_component_text_printf("target_temp", "%.1f°", target_temp);
+                id(disp1).set_component_text_printf("target_icon", "%s", climate_icon.c_str());
                 id(disp1).show_component("target_icon");
                 id(disp1).show_component("target_temp");
                 id(disp1).show_component("climateslider");