Removed debug prints, as we don't really need them now.
Fixed database updating from cache, until now only inserts was working
fine, updates failing. All because of forgotten comma :(.
Reworked handling of icons in servers lists, now they didn't
recreated, but reused from created on application start. Can also
save us much memory for long runs.
Moved gamemode detector to mainwindow_helpers, where it should be.
Fixed favorites servers - they now correctly added/removed in/from cache,
and also fixed favorite server edition dialog, which now also takes
advantage from server's cache.
Added new toolbar button for updating one server. It works :).
Added new column in servers lists, which shows is server is private or public.
Now we have pooler which will pool connections (like pinging),
so there will be no timeouts due to "we have launched 100000 goroutines".
Reworked all code to use events (see Eventer). Still more work about
this to go.
Maybe more fixes I forgot.
