Increase density of information in issue boards

• A customer says they want to see more information in issue boards.
• I think this make sense because the board view is where you do a lot of planning, and you want a lot of context.
• I think we can/should show more information on the board.
• In particular, I think we should allow more issues (cards) to be shown at the same time.
• We should show more information (weight, milestone) in each card.
• The UX challenge is clutter, difficult to consume information, and general management when the information density is high.