fixed little regression when handling previous prevent_launcher file

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/frontend

@@ -21,7 +21,7 @@ fi
 
 # Convert old prevent launcher file to new frontend disable file
 if [ -f "${PREVENT_LAUNCHER_FILE}" ]; then
-    mv "${PREVENT_LAUNCHER_FILE}" "{DISABLE_FRONTEND_FILE}"
+    mv "${PREVENT_LAUNCHER_FILE}" "${DISABLE_FRONTEND_FILE}"
 fi
 
 usage() {
@@ -71,7 +71,7 @@ init_frontend() {
     while true; do
 	
 		# Check if frontend disable file is present
-	if [ -f "${DISBALE_FRONTEND_FILE}" ]; then
+		if [ -f "${DISABLE_FRONTEND_FILE}" ]; then
 		    echo "${DISABLE_FRONTEND_FILE} file found, not starting frontend" 
 		    sleep 5
 		else
@@ -80,6 +80,7 @@ init_frontend() {
 		    umount /opk >/dev/null 2>&1
 		    rm -f "${LAST_OPK_FILE}"
 
+		    # Launch selected frontend
 	    	local frontend="$(get_frontend)"
 		    case "${frontend}" in
 			gmenu2x|retrofe)