Revert "[refactor] Make default route message a warning"

This reverts commit be1f641bf0.

setup/so-functions

@@ -746,14 +746,9 @@ compare_main_nic_ip() {
 		  read -r -d '' message <<- EOM
 		  	The IP being routed by Linux is not the IP address assigned to the management interface ($MNIC).
 
-			This has been known to cause installs to fail in some scenarios.
-			
-			Please select whether to continue the install or exit setup to remediate any potential issues.
+			This is not a supported configuration, please remediate and rerun setup.
 		EOM
-			whiptail --title "Security Onion Setup" \
-				--yesno "$message" 10 75 \
-				--yes-button "Continue" --no-button "Exit" --defaultno
-
+		  whiptail --title "Security Onion Setup" --msgbox "$message" 10 75
 		  kill -SIGINT "$(ps --pid $$ -oppid=)"; exit 1
 	  fi
 	else
@@ -761,6 +756,7 @@ compare_main_nic_ip() {
 		# just set the variable to the IP of the VPN interface
 		MAINIP=$MNIC_IP
 	fi
+	
 }
 
 compare_versions() {