Player identification improvements

More improvements for #5
- Modules can now notify CWSRestart, that they have are ready to
identify players. Otherwise CWSRestart won't even use the database. This
should improve performance when player identification is disabled
- CWSRestart will try to get the current name (under which the player is
online) first. If the player is not online, a list of known names will
be displayed
- Made IP Access dialog resizable