Simplify touchevent engine

The touch event is used only for the sleeping engine (it will be used for dimming later) and it was transferring all the json info with page name, component, entity, etc.
This was replaced by a simple random integer with no meaning other than "the screen was touched, reset the timer".

nspanel_us_code/settings.txt

@@ -25,19 +25,17 @@ Page settings
             printh FF FF FF
         
         Touch Press Event
-            printh 92
+            printh 91
             prints "touchevent",0
             printh 00
-            prints "{\"page\": \"settings\", \"component\": \"touchevent\", \"value\": \"press\"}",0
-            printh 00
+            prints rand,0
             printh FF FF FF
         
         Touch Release Event
-            printh 92
+            printh 91
             prints "touchevent",0
             printh 00
-            prints "{\"page\": \"settings\", \"component\": \"touchevent\", \"value\": \"release\"}",0
-            printh 00
+            prints rand,0
             printh FF FF FF
         
 Text bright_text
@@ -233,6 +231,11 @@ Slider brightslider
             printh 00
             prints brightslider.val,0
             printh FF FF FF
+            printh 91
+            prints "touchevent",0
+            printh 00
+            prints rand,0
+            printh FF FF FF
         
 Slider dimslider
     Attributes
@@ -261,6 +264,11 @@ Slider dimslider
             printh 00
             prints dimslider.val,0
             printh FF FF FF
+            printh 91
+            prints "touchevent",0
+            printh 00
+            prints rand,0
+            printh FF FF FF
         
 Button button_back
     Attributes