Add text field to screensaver

Supports #1065
Supports #1439

advanced/hmi/nspanel_us_code/Program.s.txt

@@ -8,7 +8,7 @@ Program.s
     int dimdelta=0
     int api=0 // 0 = disconnected from HA, 1 = connected to HA
     int is_entities=0,is_qrcode=0,is_notification=0
-    int brightness=100,brightness_dim=40
+    int brightness=100,brightness_dim=40,brightness_sleep=0
     int display_mode=2 // 1 = EU, 2 = US, 3 = US landscape
     int charset=2 // 1 = International (original), 2 = CJK
     //bauds=115200//Configure baudrate

advanced/hmi/nspanel_us_code/screensaver.txt

@@ -13,11 +13,25 @@ Page screensaver
     Events
         Preinitialize Event
             sendme
-            dim=0
+            dim=brightness_sleep
         
         Touch Release Event
             page back_page_id
         
+Text text
+    Attributes
+        ID                 : 4
+        Scope              : local
+        Dragging           : 0
+        Send Component ID  : on press and release
+        Associated Keyboard: none
+        Text               : 
+        Max. Text Size     : 1000
+    
+    Events
+        Touch Press Event
+            page back_page_id
+        
 Timer swipestore
     Attributes
         ID         : 3