Close Combat UI Improvements — Saratoga Steam update #485803

This update hopefully fixes an issue wherein some players got stuck trying to define their close combats. While I was never able to completely reproduce what the players described, I did find two bugs that could cause the key cycling of units to stop working, and the stack marker (the small grey button in a hex) to display the dialog below the close combat list, making it difficult to find.In this update, the stack marker dialog displays on top of the close combat list, and the close combat list has a "Show/Hide Detailed View" button for the attacker that will expand the close combat list to display all potential attackers on the left, and all potential defender hexes on the right. Each attacker unit has a checkbox to make it easy to select individual units, or the hex itself has a checkbox that can be clicked to choose all attacking units in the hex. Defending hexes have a single checkb...