MiliUI Damage Meters

New
- Collapse: a new title bar button folds the window down to just its title bar and expands it again. It is also in the right-click menu. The window keeps its place, so anything snapped below it stays put. The window always shows expanded while Edit Mode or the settings panel is open. The button is shown by default and can be hidden or moved under Window > Title bar buttons.
- Click-through: clicks on the bars and empty parts of the window pass through to whatever is behind it, such as the enemy you are fighting. Set it under Per window > Mouse > Click-through to Off, In combat or Always (default Off). Turn on "Title bar too" to let clicks pass through the title bar as well. "Hold to click" picks a key (Alt by default) that makes the window clickable again while held. The window also stays clickable while Edit Mode or the settings panel is open.

Fixes
- A window snapped to certain Blizzard frames could fail to show or update during combat. It now works normally in combat.