Improve SCLConsole Interrupt Command action handling

The current Interrupt Current Command is badly implemented. It just synchronously waits for 1 second, getting the UI stuck for that time and blatantly invokes Thread.stop() which is dangerous anyway.

• Wait for 5 seconds for command interruption to finish before popping a dialog that asks whether user wants to wait more or forcelly stop the command execution (= Thread.stop)
• Don't block the UI thread while waiting for 5 seconds, use ThreadUtils.getNonBlockingWorkExecutor() instead to schedule the work
• Poll if the currently executing command finishes while showing the dialog and close it automatically if the command it finishes