added event on screensaver page open, disable color by default

HMI/README.md

@@ -46,6 +46,7 @@ pageType,cardThermo
 
 pageType,popupLight,Schreibtischlampe
 
+
 ### cardEntities Page
 
 The following message can be used to update the content on the cardEntities Page
@@ -78,6 +79,10 @@ entityUpd,*name*,*currentTemp*,*destTemp*,*status*,*minTemp*,*maxTemp*,*stepTemp
 
 ## Messages from Nextion Display
 
+### screensaver page
+
+event,screensaverOpen
+
 ### cardEntities Page
 
 event,*eventName*,*PageNumber*,*PageHeading*,*entityName*,*buttonId*,*actionName*,*optionalValue*