Alert user whenever the preview port is already in use [added in 4.2.2]

Ideas
1

Hello,

When you enable the preview mode, if the port is already in use, BBS choose a random port without saying why. A message should be added when a port is already in use.

2

Thank you for starting this thread! We will improve the Preview dialog in the next release with a way to handle ports that are in use. As you suggested, we should show some kind of message and not just blindly replace the chosen port.

3

We added this in Bootstrap Studio 4.2.2 that was just released.