I saw in some images from other platforms it can take up alot of space.
Made the boxed horizontal, rather than vertical.

WIP Remade reveal zone

+ darkened card area to eaisily see boundries
+ reverted back to using a window
+ window can be resized
+ removed fake title bar and "X"
+ moved all cards revealed slightly to the right, makes it easier to
drag-select from the left

Cleanup

Changed style to use cockatrice icon

Changed cast

from static_cast to qstyleoption_cast

When sorting a view which has the last column the longest an error
happens where the view is squashed.

Previously was adding pixels, rather than using ratios. this was cutting
off cards on higher res screens

+ added comments
+ refactored optimumRect

+ When viewing a sorted view (like revealing hand, or looking at
library), the cards will now be sorted in columns based on the main card
type.
+ Settings are now saved.

Revealing a library to a player now grants that player permission to drag cards out of that library onto his own table. This permission is revoked by shuffling the library. The zone view window tracks content changes of the zone for as long as the permission lasts so that card ID changes are kept track of. This hopefully fixes issues #5 and #12.