use --index instead of -idx for compatibility with bemenu, requires similar patch for dmenu

scripts/appscripts/sxmo_rss.sh

@@ -101,7 +101,7 @@ rssreadmenu() {
 	DMENUIDX=1
 	while true; do
 		# Show list of items
-		PICKED="$(printf %b "$CHOICES" | sxmo_dmenu.sh -ix $DMENUIDX -p "RSS ($TIMESPANABBR)" -fn Terminus-15)"
+		PICKED="$(printf %b "$CHOICES" | sxmo_dmenu.sh --index $DMENUIDX -p "RSS ($TIMESPANABBR)" -fn Terminus-15)"
 		DMENUIDX="$(echo "$CHOICES" | grep -m1 -F -n "$PICKED" | cut -d ':' -f1)"
 		if [ "$PICKED" = "Close Menu" ]; then
 			die Closed Menu

scripts/core/sxmo_gpsutil.sh

@@ -223,7 +223,7 @@ menumaptype() {
 		CHOICE="$(
 			echo "$CHOICES" |
 			awk -F^ '{ print $1 }' |
-			dmenu -ix "$IDX" -p "Map Type" |
+			dmenu --index "$IDX" -p "Map Type" |
 			awk '{$1=$1};1'
 		)"
 		echo "$CHOICE" | grep "Close Menu" && exit 0

scripts/modem/sxmo_modemcall.sh

@@ -187,7 +187,7 @@ incallmenuloop() {
 		cut -d'^' -f1 |
 		sed '/^[[:space:]]*$/d' |
 		awk '{$1=$1};1' | #this cryptic statement trims leading/trailing whitespace from a string
-		dmenu -idx $DMENUIDX "$([ "$WINDOWIFIED" = 0 ] && echo "" || echo "-wm")" -p "$NUMBER" |
+		dmenu --index $DMENUIDX "$([ "$WINDOWIFIED" = 0 ] && echo "" || echo "-wm")" -p "$NUMBER" |
 		(
 			PICKED="$(cat)";
 			echo "sxmo_modemcall: Picked is $PICKED">&2