Added kick after x seconds of alt-tab

Added a kick for being unfocused from the game process for over some
amount of seconds (set via the settings.cfg file)

Updated the example settings.cfg file.

Added constant integer values for database column/field IDs to make
database code easier to understand.

Fixed a bug with signs if you try and pick up a sign while it's in
pick-up range of another item.

Fixed a bug with profile not loading data correctly from the database
(incorrect IDs due to db changes)

Added "list" parameter for "/field" command to list all existing fields.