started rework to fix MEGA65 extra keys

src/,,config_mega65.s

@@ -54,6 +54,8 @@
 ;; #CONFIG# JOY1_CURSOR                NO
 ;; #CONFIG# JOY2_CURSOR                NO
 
+;; #CONFIG# CONFIG_M65_KB_DEV          NO        ; for development, keep disabled
+
 ;; #CONFIG# PROGRAMMABLE_KEYS          YES
 
 ;; #CONFIG# KEYCMD_RUN                 "RUN"