Replace sendme by current_page text sensor

Solves #1900

esphome/nspanel_esphome_core.yaml

@@ -859,12 +859,8 @@ display:
       - script.execute: setup_sequence
     on_page:
       lambda: |-
-        if (!id(is_uploading_tft)) {
-          page_id->update();
-          if (current_page->state != page_names[x] or x == 9) {
-            current_page->publish_state(page_names[x]);
-            page_changed->execute(page_names[x]);
-          }
+        if (current_page->state != page_names[x] or x == 9) {
+          current_page->publish_state(page_names[x]);
         }
 
     on_touch:
@@ -1528,23 +1524,6 @@ sensor:
     internal: false
     disabled_by_default: false
 
-  ###### Page Id - Current #####
-  - id: page_id
-    name: Page Id
-    platform: nextion
-    variable_name: dp
-    precision: 0
-    accuracy_decimals: 0
-    internal: true
-    entity_category: diagnostic
-    on_value:
-      then:
-        - lambda: |-
-            if (!id(is_uploading_tft) and current_page->state != page_names[x]) {
-              current_page->publish_state(page_names[x]);
-              page_changed->execute(page_names[x]);
-            }
-
   ##### Display mode (1 = EU, 2 = US, 3 = US Landscape)
   - id: display_mode
     name: Display mode
@@ -1666,10 +1645,17 @@ text_sensor:
   ##### Current page name #####
   - id: current_page
     name: Current Page
-    platform: template
+    platform: nextion
+    component_name: current_page
     icon: mdi:tablet-dashboard
     internal: false
     disabled_by_default: false
+    on_value:
+      then:
+        - lambda: |-
+            if (!id(is_uploading_tft)) {
+              page_changed->execute(x.c_str());
+            }
 
   - id: notification_label
     name: Notification Label
@@ -2646,12 +2632,6 @@ script:
   - id: setup_sequence
     mode: restart
     then:
-      - lambda: |-
-          page_id->update();
-      - wait_until:
-          condition:
-            - lambda: !lambda return (not isnan(page_id->state));
-          timeout: 15s
       - lambda: display_charset->update();
       - wait_until:
           condition: