Whiptail title fixes

- Use a variable for the title
- Fix cases where the whiptail title wasn't changed previously

setup/so-setup

@@ -108,11 +108,10 @@ catch() {
 
 automated=no
 progress() {
-	local title='Security Onion Setup'
 	local msg=${1:-'Please wait while installing...'}
 
 	if [ $automated == no ]; then
-		whiptail --title "$title" --gauge "$msg" 6 70 0 # append to text
+		whiptail --title "$whiptail_title" --gauge "$msg" 6 70 0 # append to text
 	else
 		cat >> $setup_log 2>&1
 	fi