Do not show QR code icon when disabled

Solves #1876

hmi/dev/nspanel_eu_code/boot.txt

@@ -101,7 +101,7 @@ Text tft_version
         Dragging           : 0
         Send Component ID  : on press and release
         Associated Keyboard: none
-        Text               : 4.3.0b1
+        Text               : 4.3.0b2
         Max. Text Size     : 9
     
 Text esph_version

hmi/dev/nspanel_eu_code/home.txt

@@ -13,6 +13,10 @@ Page home
     Events
         Preinitialize Event
             back_page_id=0
+            if(qrcode.qrcode_value.txt=="")
+            {
+                vis bt_qrcode,0
+            }
             if(is_entitypage01>0||is_entitypage02>0||is_entitypage03>0||is_entitypage04>0)
             {
                 vis bt_entities,1
@@ -351,7 +355,7 @@ Text bt_qrcode
     
     Events
         Touch Release Event
-            if(bt_qrcode.txt!="")
+            if(qrcode.qrcode_value.txt!="")
             {
                 page qrcode
             }