Increase visual clarity of Hand Select Mode#3070

After implementing Hand Select Mode for a game and playing it with friends, I received unanimous feedback that it was too difficult to tell which cards were selected (in my case, to be discarded) and which were unselected (to be kept in the hand).

My suggestions would be:

• Increase the vertical offset of selected cards
• Add a (script-customizable) selection glow around selected objects, akin to the yellow glow around multi-selected objects in the 3D world.