Add missing options (clear_screen, multicolumn_separator, and...

Add missing options (clear_screen, multicolumn_separator, and singlecolumn_margin) for xtrn_sec in modopts.ini

ctrl/modopts.ini

@@ -70,6 +70,8 @@
 	sort = false
 ; Clear the (remote) terminal screen before executing a program
 	clear_screen_on_exec = false
+; Clear the (remote) terminal screen before displaying the menu
+	clear_screen = true     
 ; Auto-execute the only available program when entering a program section
 	autoexec = false
 ; Execute (evaluate) a JavaScript expression before/after executing any external programs (doors)
@@ -83,6 +85,8 @@
 
 ; uncomment and modify any of the below to change the look of the external programs menu
 ; to remove titles or underline, set to the text ' '
+;       multicolumn_separator: " "
+;       singlecolumn_margin=7
 ;       header_fmt: \1n\1c\1h%s \1n\1cExternal Programs:\r\n\r\n
 ;       titles: \1n\1cNum \1h\xb3\1n\1c Name                             \1n\1c
 ;       multicolumn_fmt: \1h\1c%3u \xb3 \1n\1c%-32.32s \1h