This Bugzilla instance is a read-only archive of historic NetBeans bug reports. To report a bug in NetBeans please follow the project's instructions for reporting issues.
You should see a new MySQL connection, but you don't. This only happens if the server is running. This doesn't seem right, should create the connection even if you can't connect, if MySQL is installed.
I investigated this further, and I don't think it's valid. You can't tell the port or username from an installation, so the connection you create would be pretty brain-dead, or make a lot of potentially false assumptions.