Add exclusive mode option. To make it work i implemented the SendCommand inside the SubscribingService to send message from client to service.

And reintegrate icons inside the executable.

Overhaul of the interface: removed the tabbed interface and replaced with a flyouts interface.
Moved options and Logs near the About flyouts and changed their headers from text to icon.
Add message inside lists (like the logs and controller one) when empty.

Removed UserLibrary: it did pratically nothing usefu.