Refactored the way URTrator working with profiles - now everything
that could be taken from internal cache will be taken from cache.
The very same as with servers.
Moved all callbacks from callbacks to events, so we achieve full
asynchronity here and can launch anything in goroutines :).
Moved MainWindow-related game launching functions into another
file (mainwindow_launch.go).
Made quick connect widget working. Note, that even if you're on
Favorites and trying to connect to one of favorited servers but
with quick connect - you still have to choose right profile
near Launch button!
Maybe something else I forget.
Fixed profile update with some fields changed, now it won't show
error dialog.
Removed "Second X session" checkbox column from profiles list,
have no idea (for now) how to properly use them.
Configuration is now properly saved for parameters in Options window.
Also they are restored fine.
Added tray icon with two default actions: show/hide and exit. More
to come.
