Attach to Dart Process should be clear we can place only the port #5712
Description
Is your feature request related to a problem? Please describe.
I was trying to debug a DAS fix and running a project with analyzerVmServicePort set. Once I tried writing localhost:1234, it would not connect.
Describe the solution you'd like
Change the placeholder text to make this clearer.
Describe alternatives you've considered
Mentioning the need for http:/https: scheme.
Additional context
