Moreover replace the test "Click here to select a Sonar project" by "<Double click here to start searching for a remote Sonar project...>"
The error message when a Sonar server can't be reached must also be updated :
"One of your Sonar servers cannot be reached. Please check your connection settings."
I will change the behavior to allow edition with simple click instead of double click. If you agree I will change the message to: "<Click here to start searching for a remote Sonar project...>"
Manually tested !
For the record, this message is also shown when your Sonar server requires authentication and the credentials are not entered in "Window / Preferences / Sonar".