Attempt to address Bernhard's comments

Refactor configuration to try to make items clearer (what defines a
panel vs what is user changeable).

Marlin/ultralcd.cpp

@@ -705,7 +705,9 @@ void lcd_init()
     lcd_oldcardstatus = IS_SD_INSERTED;
 #endif//(SDCARDDETECT > -1)
     lcd_buttons_update();
+#ifdef ULTIPANEL    
     encoderDiff = 0;
+#endif    
 }
 
 void lcd_update()
@@ -714,8 +716,8 @@ void lcd_update()
     
     lcd_buttons_update();
     
-    #ifdef LCD_HAS_EXTRA_BUTTONS
-    buttons |= lcd_read_extra_buttons(); // buttons which take too long to read in interrupt context
+    #ifdef LCD_HAS_SLOW_BUTTONS
+    buttons |= lcd_implementation_read_slow_buttons(); // buttons which take too long to read in interrupt context
     #endif
     
     #if (SDCARDDETECT > -1)
@@ -751,8 +753,12 @@ void lcd_update()
         if (LCD_CLICKED)
             timeoutToStatus = millis() + LCD_TIMEOUT_TO_STATUS;
 #endif//ULTIPANEL
-        
         (*currentMenu)();
+
+#ifdef LCD_HAS_STATUS_INDICATORS
+        lcd_implementation_update_indicators();
+#endif        
+        
 #ifdef ULTIPANEL
         if(timeoutToStatus < millis() && currentMenu != lcd_status_screen)
         {
@@ -860,12 +866,12 @@ void lcd_buttons_update()
     }
     lastEncoderBits = enc;
 }
-#endif//ULTIPANEL
 
 bool lcd_clicked() 
 { 
   return LCD_CLICKED;
 }
+#endif//ULTIPANEL
 
 /********************************/
 /** Float conversion utilities **/