Attribute Tile
A Tile used to display two strongly related Attributes
Supports Numeric or Dice Attributes.
Ideal for Attributes + Derived Attribute pairs.

Configuration:
- Attribute (x): a reference to the attribute to be displayed in the large area
- Attribute (y): a reference to the attribute to be displayed in the small area
- Label: the label displayed on this Element (can be empty, and will auto-complete to the Attribute's name by default)
- Show X sign (+/-): if on, will display a + before positive X attribute values
- Show Y sign (+/-): if on, will display a + before positive Y attribute values