xinit_template: Don't set SXMO_LOCK_SCREEN_OFF=1 by default

This should be a better default as users of the previous C screenlock
may expect this funcionality to work ootb / this retains prior defaults.

configs/appcfg/xinit_template

@@ -52,7 +52,8 @@ command -v firefox && export BROWSER=firefox
 # export TERMCMD="st -e"
 
 # Immediately turn the screen off when locking the device
-export SXMO_LOCK_SCREEN_OFF=1
+# (e.g. disables blue led / screen on lock mode all together)
+#export SXMO_LOCK_SCREEN_OFF=1
 
 # Immediately suspend the phone when locking
 #export SXMO_LOCK_SUSPEND=1